Mission Statement:
Our mission is to provide the highest quality Program Management, Project Management, and Construction Management services for our clients while creating an environment for our employees to thrive and be proud of their contributions.
Greenridge is steadfast in our belief that our work product or deliverable to our clients is our actual ‘service’ embodied within our employees. We believe that our employees are our most important asset and without their uncompromised commitment to our clients, we could not provide the level of care that our clients expect. In managing our tasks, we set clear expectations for our staff to maintain the highest level of transparency, accountability, and integrity.
Company History
David T. Tsao founded the Greenridge companies (Greenridge Development, Inc. and David T. Tsao & Associates, AIA) in 1988 to provide architectural design, general construction, and construction management services in the Greater Los Angeles area. In February 2008, David Tsao and Tim Oliver formed The Greenridge Group, LLC which was converted to The Greenridge Group, Inc (a California S Corporation) in March 2009. The Greenridge companies have served public and private sector clients including the Los Angeles Unified School District, Los Angeles Community College District, Delta Airlines, California Highway Patrol, the Aerospace Corporation, and several private developers.
The onset of 2023 marked a new chapter for Greenridge in that Ms. Pauline Yu acquired 100% of the company’s shares and was named President and CEO followed by her husband Mr. Sam Yu who came on board as the Managing Principal to oversee operations in April 2023.
Meet the Team
We are a team of dedicated professionals, ready to do what ever it takes to make your business grow.
Pauline Yu
President | Chief Executive Officer
Ms. Yu prior to acquiring Greenridge in January 2023 spent over 20+ years within the commercial property management sector working for large real estate investments trusts (REITs) like Hines, RREEF / Deutsche Bank, Douglas, Emmett &Co., TrizecHahn, and Jamieson Properties. Ms. Yu during her career in the commercial property management sector solidified her understanding of ‘customer service’ as part of the property management staff overseeing maintenance and operations for large, Class A high rise buildings and multi-structure complexes routinely exceeding one million gross square feet in occupied space.
Licenses / Certifications: California Real Estate License#01325109
Sam Yu, CCM, DBIA, LEED AP
Managing Principal
Mr. Yu has over 25+ years of construction and project management experience, particularly in major public works projects as well as educational, industrial, and federal facilities. He has served as project executive and principal-in-charge for numerous multi-billion programs including Department of General Services (DGS), Los Angeles Unified School District, Los Angeles World Airports, Los Angeles Community College District, Los Angeles Sheriff’s Department, Department of Defense, Department of the Navy, US Army Corps of Engineers to name a few and currently serves as Managing Principal for The Greenridge Group, Inc.
Education: Bachelor of Architecture, University of Southern California
Licenses / Certifications: Certified Construction Management (CCM) #A1494; Contractor’s State License Board – General Engineering (A) & General Building (B) Contractor License #1041809; Design Build Professional DBIA #1133; LEED Accredited Professional (LEED® AP) GBCI #10156929; US Dept. of Labor / OSHA Training Institute: OSHA 510 Certification for the Construction Industry 1999; OSHA 30HR; Dept. of the Navy NAVFACENGCOM Certification in Construction Quality Control Management, 1998, Recertified 2003
Anthony Tsao
Operations Manager
Anthony Tsao is the son of The Greenridge Group, Inc’s Founder, David Tsao, and began supporting The Greenridge Group, Inc. when his father passed away from lung cancer in 2017. His initial responsibilities of administering and executing payroll duties grew over time to encompass a more comprehensive role for Greenridge. He now serves as Operations Manager overseeing the company’s day-to-day activities and managing the corporate finance, billing, payroll, accounting and HR related functions. His decade of experience operating as a sole proprietorship in the real estate industry has taught him among many things, the value of tracking and analysis of business expenses and corporate cashflow, attention to detail and instruction, and the importance of clear and concise communication.
Education: Bachelor of Science, Business Administration, UC Riverside
Licenses / Certifications: California Real Estate Broker License #01920487, NMLS#1006346
Helen Lee, PHR
Talent Acquisition Manager
From an early age, Ms. Lee was exposed to diverse cultures through her father’s international construction projects and grew up watching him and his team build infrastructure, hospitals, and motorways across the Middle East and West Asia. These experiences shaped her passion for connecting people and building strong organizations.
Ms. Lee brings a diverse professional background and has played key leadership roles across multiple industries. She later transitioned into technology, where she led talent acquisition efforts for a start-up and supported backend and engineering R&D teams. Ms. Lee has also managed commercial real estate development projects from the ground up through tenant improvement. Her goal is to help organizations grow by building high-performing teams and creating workplaces where people feel empowered, supported and set up for success.
Education: Bachelor of Arts: International Studies, University of California, Irvine
Felipe Chuang, CCM
Program| Project Executive
Felipe Chuang is an accomplished Program and Project Executive with over 26 years of experience delivering complex construction projects valued at more than $2 billion. His expertise spans both public and private sectors, supporting local and state agencies, airports, and clients in the energy and life sciences industries.
Felipe has led major projects across diverse markets, including public education, aviation, and private developments such as the Thermal Development Lab. He specializes in all phases of project delivery—Pre-Construction, Construction, Construction Management, and Program Management—and is experienced with multiple delivery methods, including Construction Manager at Risk (CMAR), Progressive Design-Build (PDB), and Hard Bid. Notably, he served for five years on the Los Angeles International Airport (LAX) Midfield Satellite Concourse (MSC) project, navigating complex permitting and regulatory coordination with LADBS and LAWA.
At Greenridge Group, Felipe continues to bring his proactive leadership, collaborative approach, and commitment to excellence to major programs such as LAUSD’s modernization initiatives. Beyond his professional work, Felipe is passionate about community service, including building homes for families in need, visiting orphanages, and partnering with Cancer Children’s Hospital Los Angeles. His philosophy centers on building legacy together in people, processes, and projects.
Felipe holds a Master of Science in Construction Management from the University of Southern California (USC). He is a Certified Construction Manager (CCM) and a Design-Build Professional™ (DBIA), reflecting his commitment to innovation, integration, and collaboration across project delivery methods.
Education:Master of Science, Construction Management, University of Southern California
Licenses / Certifications: Certified Construction Manager (CCM) #3325, DBIA Certified #1874,
California General Contractor “B” License #99206, OSHA30
Melbourne Lopez, P.E., CCM
Project Director
Mr. Lopez is a Project Director with 20 years of experience in Construction & Program Management specializing in new construction, modernization & renovation and improvements of K-12 schools in Southern California. He has expertise in managing project cost, schedule and quality from pre-design through closeout, commissioning and occupancy including facilitating project certification through the Division of the State Architect. He has implemented best management practices at various client locations such as Integrated Project Delivery, Design Build, Risk Management, Best Value Procurement and Quality Management.
Education: Bachelor of Science, Civil Engineering, CSU Northridge
Licenses & Certifications: Professional Engineer: California #83220; Certified Construction Quality Management for Contractors (CQM); Certified Construction Manager (CCM) #3285
Shelia Taylor
Project Director
Shelia Taylor is a recognized Project Executive with over 20 years of demonstrated success in the delivery of a diverse range of construction programs and projects valued at over $500 million. Although trained as an architect, Shelia’s professional career has been refined to that of a trusted Owner’s Representative spanning various sectors including affordable housing, transportation, heavy civil infrastructure, and education. She specializes in leading large agency projects with a keen understanding of what it means to manage the optics of such high-profile projects.
Education: Bachelor of Architecture, Prairie View A&M University, Texas
Licenses & Certifications: Certificate of Construction Management, UCLA 2006, CCM Pending
Stephen Kimball
Project Director
Mr. Kimball has worked on a wide range of project sectors under various expedited contracting methods including Design-Build, GMP, Negotiated Best Value, Progressive Design-Build, CMA, CMAR, CA 17406 Development and Lump Sum. He is recognized in the industry for his ability to isolate and resolve design and compliance issues early in a project’s evolution, and his aptitude and expertise are evidenced in the many successful projects with which he has been involved. Steve has extensive experience in the startup and management of large complex projects from concept through delivery, implementing effective communication procedures and management processes for all team components.
Education: University of Utah Construction Engineering Program
Licenses & Certifications: Certified LAWA Project Management Program
Douglas Cottone
Sr. Project Manager
Mr. Cottone has over 25 years of experience managing large-scale construction projects, including K-12 and College programs. His broad project and program management experience includes Project Engineering, Estimating, Project and Construction Management, Cost Engineering, Systems Management, and Field Engineering. Mr. Cottone has worked on several large educational programs, including a 12-campus $144 million LAUSD assignment.
He has an excellent understanding of all phases of project design and construction, including estimating and support functions.
Education: Bachelor of Science, Construction Management, Cal Poly San Luis Obispo
Marc Orozco, P.E., PMP, CCM, MBA
Senior Project Manager
Mr. Orozco has 12+ years of experience providing project management and construction management for both Federal and Public Agency infrastructure and facility contracts. He is skilled at planning and managing staff and equipment resources to meet project quality, budget, and schedule requirements while maintaining site safety. Mr. Orozco is an honorable veteran, former Army Engineer Officer with successful project management experience in a fast-paced multifaceted environment, and Owner’s Representative.
Education: Master of Business Administration (MBA), University of Southern California, 2019
Bachelor of Science, Civil Engineering, United States Military Academy, West Point, NY, 2011
Licenses & Certifications: Professional Engineer (P.E.) – C#86736, Project Management Professional (PMP) – #1820334, Certified Construction Manager (CCM) – CMCI#9426, Construction Quality Management for Contractors (CQM), Contracting Officer’s Representative (COR)
Sonseeahray Barrett
Senior Project Manager
Ms. Barrett is an Asset/Move Project Manager with over 20 years’ experience in the Architectural Engineering and Construction Industry in K-12 and Higher Education Programs. Her expertise spans from Accounting and Contracts to Asset/Move Management. Ms. Barrett brings with her amazing Leadership, Prioritization and Data Driven results. As an Asset/Move Project Manager, Ms. Barrett leads cross functional coordination activities to develop and maintain accurate and complete records, ensuring data accuracy and compliance. Ms. Barrett’s vast experience has also contributed to her development of budgets, controlling cost, schedule management and maximizing client’s investment recovery.
Education: Bachelor of Arts, Liberal Studies: Biology, California State University Long Beach
Richard Reed, PE
Senior Project Manager
Mr. Reed is a licensed Professional Civil Engineer and Construction Project Manager with 20 years of experience in the construction industry. He is a reliable and trustworthy leader who can communicate effectively, solve complex issues and deliver projects and programs on time and on budget. Mr. Reed’s focus is to support the client which takes supporting everyone on the project to be the best they can be. He is a firm believer in you get what you put in.
Education: B.S. Structural Engineering, UC San Diego
Licenses & Certifications: Professional Engineering License CA#75754, OSHA10
Mario Ceron
Sr. Project Manager
Mr. Ceron has 19 years of experience in relocation management having provided these services in an exemplary fashion at LACCD Valley College since April 2008 and for the complex and ever-changing internal relocations within the motion picture and television production facilities at Universal Studios from 2001-2005. The skills developed in coordination, scheduling and team building amongst often disparate interests and timelines, to bring projects to on time completion during his quality control position with the Walt Disney Company served his future clients well. Mr. Ceron has demonstrated his abilities to coordinate the seamless procurement and installation of furniture, fixtures, and equipment (FF&E) with project designers, Building User Groups (BUG), College Project Leadership Team (CPLT) and the coordination of the often-complex campus staff move management process with General Contractor completion schedule and campus use needs. He maintains his diligence through the punch list and closeout phases to ensure completion of the assignments.
Education: Harlington High School, Harlington, Texas
Licenses / Certificates: UCLA Construction Management Certificate
Sala Yao
Program Manager
Ms. Yao is a seasoned design professional with over 20 years of experience in the construction industry with a deep understanding of K-12, Higher Education and Healthcare project types. She loves architecture and shepherding an idea through design and ultimately through construction. Through persistence, being process-oriented, and understanding the needs of all stakeholders, Ms. Yao thrives on the opportunities to break free of preconceived notions and finding the right solution to unique challenges.
Education: Bachelor of Architecture, Southern California Institute of Architecture
Licenses / Certificates: OSHA10
Ling Long, AIA, LEED AP BD+C
Project Architect
Ms. Long offers over 20 years of experience in mixed-use commercial, office, retail, hotel, residential and cultural projects for major architectural design firms in Los Angeles. She has worked extensively in California and internationally, with work in Serbia, Indonesia and China. She has served as a project manager for complex project types for over 12 years, and is skilled in design supervision, establishing project priorities, and coordination with client and consultants. She is diligent in the supervision of deliverables, schedule, budget and staff for a variety of project types.
Education: Master of Architecture, Southern California Institute of Architecture
Bachelor of Engineering, Urban Design, Wuhan University, China
Licenses / Certificates: Licensed Architect, CA #C-36479 / LEED AP BD+C
Mariapaz S. Mendoza
Project / Design Manager
Ms. Mendoza is a seasoned project management professional with over 24 years of K-12, Higher Education, and Civic project experience. She has a comprehensive understanding and ability to coordinate with the design team in developing technical solutions and is an effective team player with a high level of proficiency in the production of construction documents, project management, and construction administration. Ms. Mendoza has been involved in projects across the Counties of Los Angeles, Orange, San Bernardino, and Riverside and is now serving as a Design Manager for the Los Angeles Unified School District.
Education:Bachelor of Science in Architecture, University of Santa Tomas, Manila, Philippines
Licenses / Certificates:Licensed Architect – Manila, Philippines
Brian Yeley
Senior Project Manager
Mr. Yeley is a Project Manager with more than 20 years of experience in architectural and interior design, office space planning, facility repair and maintenance, and tenant improvements, including extensive experience overseeing design and construction contracts with public clients in Los Angeles County. He has the demonstrated ability to coordinate multidisciplinary teams and manage multiple concurrent projects to meet quality, schedule, and budget objectives.
Education: Master of Architecture, Graduate School of Architecture Planning and Preservation, Columbia University
Bachelor of Science, Architecture, College of Architecture and Urban Planning, University of Michigan, Ann Arbor, MI
Licenses / Certificates: Certified Construction Manager (CCM) – Currently Renewing
Crystal Tan, AIA NCARB
Project Architect
Ms. Tan is a creative problem-solver with a passion for design. She has an academic background in architecture and interior design and 10 years of professional architectural experience across various project types and scales. Ms. Tan’s primary market experience includes K-12, market rate/affordable multi-family housing, and commercial office. Her secondary market experience includes higher-education housing, hospitality, transportation, tenant improvement retail banking, and high-rise offices. As of December 2024, Ms. Tan is a California-licensed Architect, ready to apply her expertise to designing and building spaces that elevate people’s lives, embrace culture/identity, and nurture the environment through sustainability.
Education: Master’s Degree in Architecture, Woodbury University
Licenses / Certificates: California Licensed Architect #C41518, NCARB Certified
Dimitris Klapsis, LEED AP BD+C, RA
Project Architect
Mr. Klapsis is a licensed California architect with over 30 years of design and project management experience. He has extensive knowledge and experience designing high education and K-12 projects across several school districts making him adept at navigating regulatory processes, client needs, and delivering projects that balance quality, functionality, and budget.
Education: Master of Architecture, University of Southern California, Bachelor of Architecture, Aristotle University of Thessaloniki, Greece
Licenses / Certificates: California Licensed Architect – #C32032
Registered Architect in the Greek Technical Chamber
USGBC – LEED Accredited Professional BD+C
Hyeyoon Chung, AIA, LEED AP
Project Architect
Ms. Chung is currently serving as a Design Manager for the Los Angeles Unified School District and leads projects from conception through construction, coordinating user group needs, managing consultants, procurement, managing DSA approval and post-approval processes including CCDS, DSA Inspection cards, FTN responses, and closeouts. She has extensive expertise over 20 years in architectural design, construction documentation and administration, with a focus on planning, managing, and construction administration of DSA projects involving K-14 campus modernization and new construction.
Education: Master of Architecture, University of California Los Angeles, Bachelor of Fine Arts, Painting, Seoul National University
Licenses / Certificates: California Registered Architect #C31646, LEED Accredited Professional
Robert Villagomez, AIA
Senior Design Manager
Mr. Villagomez is a seasoned and licensed California architect with over 35 years of design and project management experience. He has successfully managed the design, documentation, construction schedules and budgets of various building types and complexities including commercial, public, and education project types. Mr. Villagomez values architecture that enhances everyday experiences while meeting the evolving needs of clients and communities.
Education: Master of Architecture, Graduate School of Architecture and Urban Planning, UCLA
Bachelor of Arts, Architectural Design, Princeton University
Licenses / Certificates: California Licensed Architect #C34669, OSHA10
Jacqueline Cortez, Assoc. AIA
Project Development / Design Manager
Ms. Cortez is a Senior Design and Construction Manager specializing in construction-driven project delivery, with a 16-year track record of guiding design and construction teams through construct-ability, cost control, and construction execution. She is experienced with managing consultants, contractors, and agency stakeholders to deliver safe, compliant, and on-schedule DSA and HCAI buildings. Ms. Cortez is adept at stakeholder engagement, regulatory coordination, and executive reporting to ensure successful outcomes in the built environment
Education: Master of Architecture, Arizona State University
Master of Urban Design, Universidad Torcuato de Tella
Bachelor of Arts, Design Studies, Arizona State University
Licenses / Certificates: Associate AIA#38574954, NCARB#825800, CCM – In Progress
Hagop “Jack” Barsamian
Senior Project Manager
Mr. Barsamian brings 15+ years of experience working in public school projects with DSA and LEED standards and 10 years of experience in high-end luxury homes and commercial construction work. He has consistently increased responsibilities in the fields of construction, construction management, and maintenance & operations in a multi-site environment for 20+ years. Jack is an excellent communicator with strong time management skills and is able to multi-task and meet tight deadlines without compromising quality of work and the safety of others. Mr. Barsamian joined Greenridge in January 2024 and operates as an Owner Authorized Representative II for Los Angeles Unified School District’s Project Execution Team.
Education: Bachelor of Science, Communications Engineering, ITT Tech
Bachelor of Science, Computer Science, ITT Tech
Licenses / Certificates: General Building (B) Contractor License – #907552
Ahmed Selim
Senior Project Manager
Mr. Selim has over 30 years of general contracting and construction management experience in the US and overseas. He has served many sectors including K-12 capital improvement programs, hospitality buildings, high rises, parking structures, and medical facilities. Mr. Selim has completed projects from conceptual design through construction completion and post construction phases under various delivery methods including Design- Bid-Build, Design-Build, and Lease / Lease-Back. He is a servant leader and mentors his team to advance their careers in the construction industry.
Education: Education: Bachelor of Science, Civil Engineering, University of Alexandria, Egypt
Licenses / Certificates: LEED Accredited Professional (LEED AP) BD+C, OSHA30
Barry Paxson, CCM, LEED AP
Senior Project Manager
Mr. Paxson is a motivated and results-driven construction executive with over 26 years of experience leading high-impact, multi-million dollar projects across healthcare, entertainment, education, and infrastructure sectors. He is renowned for delivering complex initiatives under HCAI (OSHPD), DSA, and LEED platinum standards, with a client portfolio that includes LAUSD, Disney, Boeing, TSA, Carnival Cruise Lines, Hoag Presbyterian, Valley Presbyterian, and Providence Health & Services. Mr. Paxson is an expert in client relationship management, financial oversight, strategic planning, and cross-functional team leadership. He drives operational excellence while maximizing profitability and has the proven ability to navigate intricate regulatory landscapes, streamline processes, and foster innovation which positions him as a transformative leader in the construction industry.
Education: Bachelor of Science, City and Regional Planning, California Polytechnic State University, San Luis Obispo, 1992
Licenses / Certificates: : Certified Construction Manager #6410, USGBC LEED AP, UCLA Certificate in Construction Management
Catherine A. NeVille
DSA Program | Project Liaison
Catherine NeVille has over 30 years of experience in the construction industry specializing in the Division of the State Architect (DSA) process and over 23 years of higher education DSA field experience including serving the Los Angeles Community College District for 17+ years. She has been responsible for making sure DSA requirements were met and all required documentation submitted to DSA in order to achieve full certification by preventing obstacles from slowing down construction and resulting in claims. Catherine has developed an excellent working relationship with DSA representatives and has been instrumental in the resolution of site issues with the DSA and project personnel. In addition, she provides oversight in the selection and monitoring of Project Inspectors and Laboratory of Record firms additional fees to ensure budgets are maintained. She leads and develops people while promoting excellent morale with client relationships and controlling costs on every level.
Education: Attended California Polytechnic University – Pomona, Biological Sciences
William Merbach
General Constructability Specialist
Mr. Merbach has over 40 years of experience in the construction field with expertise in all phases of the process, from concept to completion, as a Project Superintendent. With expertise in project planning, bidding, and awarding of numerous school projects with the Los Angeles Unified School District, Mr. Merbach has proven to be a valuable resource on educational and other public facilities projects. He is knowledgeable of the day-to-day responsibility required on the construction site. Mr. Merbach has served as Project Superintendent for numerous LAUSD school projects and large public commercial projects. He currently serves as the sole Constructability Review Specialist – General for the Los Angeles Unified School District’s Project Execution Branch.
Education: Associate of Arts, Mt. San Antonio College
Paul Dempsey
Preconstruction | Constructability Services Lead
Mr. Dempsey brings more than 25 years of construction experience in a wide variety of markets including Education, Entertainment, Healthcare, Hospitality, Mixed-Use, Civic, Industrial, and Transportation, as well as delivery methods to include Guaranteed Maximum Price (GMP), Design-Build, CM at-Risk, Design-Bid-Build, CM, and Integrated Project Delivery (IPD). He is recognized as an industry leader for his comprehensive knowledge and innovative approach to preconstruction services. His in-depth knowledge, diversity of experience, and understanding of all aspects of construction enables him to quickly assess constructability and provide constructive solutions achieving the overall success of the project.
Education: Bachelor of Science, Business Administration, Business Management, University of Phoenix
Ken Li, PMP
Project Manager
Mr. Li has over 21 years of diversified experience in the construction industry including: project management, construction management, and design/build management. He has extensive experience with construction coordination and supervision, GMP & Lump Sum contract preparations, negotiations, and execution, budget preparation, cost analysis and management, and schedule management. Mr. Li has expertise in High Rise, Healthcare, Commercial, Seismic Retrofit Upgrades, Aviation, Critical Data Facilities, Education, and has significant experience working with local, state, and federal agencies including DSA, OSHPD, LADOT, LADBS, LADWP, and the County of Los Angeles Public Works. He is currently a Project Manager supporting the Los Angeles Unified School District.
Education: B.S. Construction Engineering Management, CSU Long Beach
Licenses / Certifications: US Army Corps of Engineers (USACE) – Construction Quality Management for Contractors
USACE 385-1-1 / OSHA30
Anthony Aliaga, CMIT
Project Manager
Mr. Aliaga is a Project Manager with over 9 years of experience providing assistance to program and project teams by executing various project delivery methods to meet client goals. Mr. Aliaga brings experience of managing civil design development and construction oversight for multiple projects and programs within various markets including County of Los Angeles, Los Angeles World Airports, public and private school districts (K-12 and higher ed), hospitals, and commercial developments. While working with Los Angeles County, Mr. Aliaga earned two Letters of Commendation from the Board of Supervisors, one from 1st District Supervisor, Ms. Hilda Solis, and the second from 4th District Supervisor, Ms. Janice Hahn. Mr. Aliaga is currently pursuing his CCM certification and serves as a Project Manager for the Los Angeles Community College District BUILD program.
Education: Bachelor of Science, Civil Engineering, San Jose State University, CA
Licenses / Certifications: Construction Manager-in-Training
Francisco Lopez
Project Manager
Mr. Lopez has over 12 years of experience working for various city and K12/Higher Education districts in Southern California including the LACCD MATOC program where he worked at Pierce College for over five years. He is now serving as an Owner Authorized Representative (OAR) at the Los Angeles Unified School District (LAUSD). Mr. Lopez is diligent in managing all aspects of construction and has demonstrated an ability to overcome roadblocks and deliver projects successfully. He believes in transparency, communication, and collaboration, and strives to be a strong advocate for his clients.
Education: Bachelor of Science, Civil Engineering, California Polytechnic State University, Pomona, 2009
Brenda Sosoban
Project Manager
Ms. Sosoban is a Project Manager with over 20 years of experience in the construction industry, delivering projects across public works, K-12 and higher education, institutional and luxury residential buildings. She excels at fostering collaboration among clients, contractors, consultants, and government agencies to meet or exceed design, quality, timeline, and budget expectations. Her leadership style emphasizes accountability, proactive problem-solving and clear communication. Ms. Sosoban is serving as a Project Manager for the Los Angeles Unified School District
Education: Bachelor of Science in Civil Engineering, Mapua Institute of Technology, Manila, Philippines
Licenses / Certifications: Licensed Civil Engineer #0067658- Manila, Philippines, General Building Contractor License – CSLB License #1009020 OSHA30
Jeremiah Harrison
Project Manager
For nearly two decades Mr. Harrison has specialized in the construction, modernization, and closeout of more than 50 educational (K-14) public works projects in Southern California for the Los Angeles Unified School District (LAUSD) and the Santa Monica Community College District (SMCCD). He has served in various capacities and has been engaged across all phases of construction but has extensive knowledge and experience with DSA closeout & certification. Mr. Harrison is currently serving as an Owner Authorized Representative for the Los Angeles Unified School District.
Education: Bachelor of Architecture, Woodbury University
Licenses / Certifications: OSHA10
Aidee Jimenez
Project Manager
Ms. Jimenez is a detail-oriented construction professional with over 20 years of experience managing commercial, public, education, and residential projects. She has demonstrated the ability to deliver safe, high-quality projects through with project teams. subcontracts and stakeholders. Ms. Jimenez is committed to driving team success and supporting organizational goals through effective project oversight and strong collaboration.
Education: Bachelor of Science, Construction Engineering Management, CSU Long Beach
Licenses / Certifications: OSHA30
Thomas Valdez, CCM,EIT
Project Manager
Mr. Valdez has 12+ years of experience providing construction and project management services. He is skilled at providing services adhering to claims, contracts, cost, time, and risk principles to clients in local government sectors and education such as Fremont Unified School District, Chabot-Las Positas Community College, Los Angeles County Internal Services Department, and the Los Angeles Unified School District. Mr. Valdez successfully guided clients through permitting with Jurisdiction Having Authority (JHA), project and construction scheduling, and project budgeting and cost control in accordance with client requirements. Mr. Valdez is experienced with evaluating contractor bids and recommending award, evaluating contractor baseline and progressive schedules, evaluating cost-loaded schedules, and approving accurate progress payment applications, general construction management pertaining to shop drawings, RFIs, ASIs/CCDs, and implementing contractual requirements during construction. He is also adept at working with project stakeholders and contractors to minimize disruptions to the community. Mr. Valdez’s professional background includes issuing subcontracts and purchase orders, analyzing technical cut sheets and submittals for compliance with contract specifications, implementing document control solutions, and organizing project files.
Education: Bachelor of Science, Civil Engineering, University of California, Davis, 2010
Licenses / Certifications: Certificate of Construction Management #202583, Engineer-in-Training
Andrew Oldfield
Project Manager
Mr. Oldfield is a seasoned construction professional with 17+ years of diverse experience in all facets of construction project management from development to close-out of commercial, government/military, and industrial projects. He is resourceful and results-oriented in managing multiple responsibilities, objectives, people, budgets, and timelines. Mr. Oldfield is committed to value engineering and other methods that save time and money while adhering to the highest quality standards.
Education: Bachelor of Arts, Film with a Minor in Construction, Humboldt State University
Top Graduate / Level 6 Apprentice – Iron Workers Union Local 416
Licenses / Certifications: CCM – In Progress
OSHA30
Norma Carner
Project Manager
Ms. Carner is a results-driven construction professional with 8+ years of progressive experience supporting multi-million dollar educational and public works projects throughout Los Angeles County. She is adept at bridging communication between the project team, contractors, and stakeholders to maintain cost, schedule, and compliance objectives.
Education: Bachelor of Science, Business Administration – Management, California State University, Long Beach
Licenses / Certifications: OSHA30, PMP – In Progress
David Rennie
Sr. Scheduler / Claims Specialist
Mr. Rennie has 18 years of experience in the AEC industry specializing in scheduling and time impact analysis. He is an expert in utilizing Primavera P6 scheduling software to perform scheduling analysis and development of the master schedule.
Education: Bachelor of Science, Construction Management, Colorado State University
Licenses / Certifications: Project Management Institute – Scheduling Professional (PMI-SP), Construction Quality Management for Contractors (CQM), OSHA10
Jennifer Salinas, PSP, STS-C
Senior Scheduler / Program & Project Controls Manager
Ms. Salinas brings 29 years of comprehensive experience across the full spectrum of program and project management. Her expertise spans every phase of the project lifecycle, with a strong emphasis on client and stakeholder engagement, contract negotiation and administration, and project controls. She has led efforts in process improvement auditing, PMIS system implementations, budgeting and forecasting, cost and schedule management, contractor schedule reviews, time impact and forensic schedule analyses, cost estimating, change order administration, earned value management, subcontractor management, contract administration, revenue recognition, contract compliance, accounting, procurement, reporting and stakeholder communications.
Education: Bachelor of Arts, Business Administration – Project Management, InterContinental University, 2008
Licenses / Certifications: AECOM Certified Project Manager, UCLA Extension; BCSP, Safety Trained Supervisor- Construction, (STS-C), Certification # STSC-IEX09612; OSHA 10; AACE, Certified Planning & Scheduling Professional (PSP)/AACE, Certification # 937; Certified Interim Cost Consultant (ICC)/AACE
Christian Ramos
Project Scheduler
Mr. Ramos has over six years of extensive experience collaborating with renowned general contractors in the construction industry. His diverse background encompasses field operations, office management, Virtual Design and Construction (VDC)/Building Information Modeling (BIM), and specialized expertise in P6 Primavera project scheduling, particularly within the healthcare and private school district. In his role as a scheduler, Mr. Ramos possesses over three years of comprehensive P6 Primavera scheduling experience, overseeing the maintenance and updating of intricate project schedules ranging from 1,000 to 20,000 activities. His proficiency extends to facilitating various scheduling processes, including pull planning sessions, preliminary bid schedules, cost loading and manpower baseline schedules, monthly updates, written narrative reports, Time Impact Analysis schedules, and fragnet schedules. Mr. Ramos currently serves as a scheduler for the Los Angeles Unified School District (LAUSD) existing facilities team executing repairs and modernization projects across existing school campuses for the specific needs of students, staff, and parents.
Education:Bachelor of Science in Construction Engineering Technology, Cal Poly Pomona
Licenses / Certifications: OSHA 10-Hour, General Building (B) Contractor License – #1103339, LEED Green Associate
Carolyn Som
Contract / Procurement Specialist
Mrs. Som has over 10 years of experience working in the Engineering, Procurement and Construction Management field over a various of industry that include oil, gas, aviation, and education. Starting as a procurement technician early on in her career, Mrs. Som has continued to expand her knowledge of the field by working as an inventory/system administrator, buyer, change management and currently serves as a contractor administrator for the Build-LACCD program.
Education: Bachelor of Arts, Social Work, California State University, Los Angeles, 2009
Associate of Science, Construction Management, Citrus College, Glendora, In-Progress
Katina Childs
Asset Move Coordinator
Ms. Childs has over 10 years of corporate and university experience specializing in asset management, move coordination, and facilities information systems. Her involvement within the construction industry encompassed many facets including data management systems, human resources, and extensive experience in contract administration. Prior to joining Greenridge, Ms. Childs spent 5 years working for the Director of Finance and Facilities in Advancement Services at the California Institute of Technology (Caltech). There she managed the day-to-day activities of maintaining close communications with various end-users with respect to scheduled maintenance and operational projects / work orders, ensuring that all tasks were completed efficiently and to the highest level of satisfaction. With a friendly and approachable demeanor, Ms. Childs effortlessly connects with others, building strong relationships with her peers and clients alike and we at Greenridge are proud to have her on our Team.
Education: Various course studies @ Mount San Antonio College, Foothill College, and Pasadena City College
Jesus Salazar
Asbestos Abatement Coordinator
Mr. Salazar has over 35 years of experience in the asbestos and lead abatement field possessing a diverse skill set. He is known for flexibility and dedication in deadline-driven environments. Mr. Salazar is committed to excellence in achieving any goals set forth and is skilled in fostering positive relationships with both team members and client, while adhering to safe work practices and client specifications.
Licenses/Certs: Asbestos Abatement Contractor/Supervisor,Lead-related Construction Certificate, CDPH CEG–Lead Worker, HAZWOPER, OSHA30
Vanessa Vasquez
Assistant Project Manager
Ms. Vasquez is a construction professional with 7 years of experience supporting the design and coordination of commercial, public works, higher education, and K-12 projects. She is adept at collaborating with multi-disciplinary teams and is an effective communicator who is motivated to deliver high quality deliverables to achieve the client’s project goals.
Education: Bachelor of Science, Architecture, Minor in Environmental Design and Urbanism in Developing Countries, UC Berkeley
Licenses / Certifications: OSHA10
Patrick Hall
IT Specialist
Mr. Hall is an IT professional with 15 years of experience providing a wide range of technical support to clients for hardware, software, and network needs. He is organized, goal-oriented, and an excellent communicator able to troubleshoot issues efficiently for end-users and clients.
Education: Bachelor of Science, Business Administration, Computer Information Systems, California Polytechnic University, Pomona
Licenses / Certifications: A+ CompTIA Certification