About Our Firm

The HTG Team

Harrison Thomas Group is a dynamic employee owned small business and each employee has decades of experience in the commissioning industry.  Due to our size, we are dynamic and responsive at all levels to each project requirements.  We act as a team, not merely a chain of command.  Each member of HTG is empowered to provide our services from pre-design to post occupancy.  Therefore, we do not have an organizational structure, rather merely team members.  Our team members are as follows:

Isaac Chambers

Isaac Chambers

PE, CCP, LEED AP | Partner, HTG


BSME Queen’s University Kingston, Canada

Summary of Experience:

Isaac entered the engineering field as an HVAC designer and design review specialist after obtaining his degree. After working in the design field for several years, Isaac decided to concentrate his appreciation for details in the commissioning arena. For the past eight years, he has served as Commissioning Project Manager for LEED and Calgreen Commissioning Projects for key large clients such as USC, UCLA and Kaiser Permanente. Representative projects include educational facilities such as laboratories and dormitories, office buildings, and other highly technical facilities such as vivariums. His services include basic MEP commissioning through total building commissioning and Level 5 integrated systems testing.  He has contributed to several building commissioning conferences by speaking on the latest best practices in the Commissioning Industry. 

Representative Projects:

Healthcare: Kaiser Permanente Moreno Valley Hospital & IRIS MOB (Moreno Valley, CA), Kaiser Walnut Creek Chiller Replacement (Walnut Creek, CA), Sutter Health CPMC Boiler Replacement (San Francisco, CA), UCLA MOB 100 Controls Upgrade (Los Angeles, CA), UCLA 16th Street Outpatient Clinic (Santa Monica, CA)

Pharmaceutical: Nektar Therapeutics (San Francisco, CA), Amgen B21 Renovation (Thousand Oaks, CA), Agensys Manufacturing Facilities (Santa Monica, CA), Pfizer CB-10 (La Jolla, CA)

Education (K12):  De La Salle STREAM Project (Concord, CA), Marin Academy of Sciences (San Rafael, CA), Glendale Unified School District – Various Schools (Glendale, CA), Woodside Priory School (Portola Valley, CA)

Education (College/University):  USC John McKay Center (Los Angeles, CA), USC Heritage Hall (Los Angeles, CA), USC University Village (Los Angeles, CA), USC Seely Mudd (Los Angeles, CA), UCLA Weyburn Graduate Housing (Los Angeles, CA), UCLA Sproul Hall (Los Angeles, CA), UCLA Deneve Hall (Los Angeles, CA), UCLA Young’s Research Library(Los Angeles, CA), UCLA Hershey Hall (Los Angeles, CA), UCLA South Court of Sciences (Los Angeles, CA), UCLA Dykstra Hall (Los Angeles, CA), UCLA Hedrik Hall (Los Angeles, CA), UCLA Semel Institute (Los Angeles, CA), UCLA Boelter Hall (Los Angeles, CA), UCLA School of Public Health (Los Angeles, CA), Ostin Music Hall (Los Angeles, CA), UCLA Engineering 6 (Los Angeles, CA), UCLA Luskin Conference Center (Los Angeles, CA), College of San Mateo (San Mateo, CA), LAVC Child Development Center (Los Angeles, CA), SLAC Building 41 (Menlo Park, CA), SLAC Building 53 (Menlo Park, CA)

Hotel/Hospitality: Hilton Bayfront (San Diego, CA), UCLA Glenrock / Landfair Apartments (Los Angeles, CA), UCLA Hilgard Apartments (Los Angeles, CA), UCLA Saxton Suites (Los Angeles, CA),

Data Centers: AAA Data Center (Costa Mesa, CA), Verizon Tempe Data Center (Tempe, AZ),

Civic: Crosspoint Church TriValley (Pleasanton, CA), Santa Monica Parking Garage 6 (Santa Monica, CA), San Jose Convention Center (San Jose, CA),

Technology: Various Major Technology projects (Bay Area, CA)

Airport:  United Club Terminal 3 – SFO (San Francisco, CA), United Inflight Services – SFO (San Francisco, CA)

Office: Playa Vista Parcel 3 (Los Angeles, CA), Playa Vista Parcel B (Los Angeles, CA), Playa Vista Parcel C (Los Angeles, CA), DTLA ROW (Los Angeles, CA), 712 S Olive Street (Los Angeles, CA), 2209 ECR (Palo Alto, CA), Harris Stratex (Santa Clara, CA),


Melissa Mason

Melissa Mason

QCxP, LEED AP | Partner, HTG


BSMS Mechanical Engineering San Jose State University. Concentration in Mechanical Design

Summary of Experience:

Melissa started her career being a mechanical design engineer prior to switching over to the Commissioning field. She has diverse experience with her years of experience. She has been the project manager for such clients like SLAC, NASA Ames, Apple, Inc. and various college campuses of the Bay Area. She has a passion for existing buildings which need to be made energy efficient.   She has decades of experience in the building industry in California and beyond.  She is a member of the Association for Facilities Engineering and has led the organization in the past. She has also mentored engineering students in the career of energy efficiency and mechanical design engineering through running the Day with A Facilities Professional with AFE.

Representative Projects:

Healthcare: Sutter Health Mills Peninsula Hospital (Millbrae), Varian Medical Systems (Palo Alto, CA), MedImmune (Baltimore, MD)

Pharmaceutical: Nektar Therapeutics (San Francisco, CA)

Education (K12):  Lexington School (Los Gatos, CA), Sacred Heart School (Menlo Park, CA), Williams and Colusa Unified School District (Colusa, CA), Gilroy High School (Gilroy, CA)

Education (College/University):  SLAC Building 26 (Menlo Park, CA), SLAC Building 40 (Menlo Park, CA)SLAC Building 41 (Menlo Park, CA), SLAC Building 53 (Menlo Park, CA), UCSF Hellen Diller Cancer Research Center (San Francisco, CA), Foothill College Library (Los Altos, CA), Foothill College District Offices (Los Altos, CA), Foothill College Building 1900 (Los Altos, CA), Foothill College Building 5500 (Los Altos, CA), Foothill College Building 6100 (Los Altos, CA), Foothill College Building 6300 (Los Altos, CA), Foothill College Building 6500 (Los Altos, CA), Foothill College District Offices (Los Altos, CA), De Anza College Science Center (Cupertino, CA), West Valley College Language Arts and Social Sciences Building (Saratoga, CA), CCSF Wellness Center (San Francisco, CA), US Naval Post Graduate School Engineering Building (Monterey, CA)

Hotel/Hospitality: Atman Hotel (Atman, CA), Villa Montgomery (Redwood City, CA), Gish (San Jose, CA), Casa Feliz (San Jose, CA), Mercy Housing (San Francisco, CA)

Civic: San Jose Southside Police Station (San Jose, CA), San Jose Convention Center (San Jose, CA), United States Postal Service (San Mateo, CA), Immigration and Naturalization (San Jose, CA)

Technology: Various Major Technology projects (Bay Area, CA), NASA Ames Research Center D-Wave Computer (Mountain View, CA)

Airport:  Mineta San Jose Airport Rental Car Facility (San Jose, CA), United Club Terminal 3 – SFO (San Francisco, CA), United Inflight Services – SFO (San Francisco, CA)

Office: Harris Stratex (Santa Clara, CA), Wells Fargo 550 California (San Francisco, CA)

**Projects are a mix of HTG and previous work during Melissa and Isaac’s career.  Additional references and details are available upon request.