CGI Technical Services provides the following partial list of clients that we have helped in the past:
  - Axner Excavating
- Bay Cities Construction
- C&H Development
- CH2M Hill
- City of Anderson
- City of Red Bluff
- City of Redding
- City of Yreka
- City of Chico
- City of Weed
- City of Ft. Bragg
- City of Shasta Lake
- DeSilva Gates
- DMJM Harris
- E. Johnson Construction
- Eagle Peak Rock & Paving
- Fairchild Medical Center
- Fugro West
- Gallino Construction
- Gifford Construction
- Golder Associates
- Granite Construction Company
- Griffith Company
- Hat Creek Const. & Materials
- Insignia Builders
- Iron Mountain Operators
- J.F. Shea Company
- Jaxon Enterprises
- Kennedy Jenks Consulting
- Knife River Construction
- Laco Associates
- LTM Construction
- McGeorge Construction
- Mead & Hunt
- Mercer Fraser
- Mercy Medical Center
  - Modoc County
- Muse Concrete
- New Urban Builders
- Nichols Melburg Russetto
- Ninyo & Moore
- North Valley Building Services
- Northstate Ready Mix
- Omni-means LTD.
- Palomar Construction
- Plumas County
- Safeway, Inc.
- Shasta College
- Shasta Constructors
- Shasta County
- Shasta Ready Mix
- SHN Consulting Engineers
- Sierra Pacific Industries
- Simpson College
- Siskiyou County
- Siskiyou Design Group
- Siskiyou UHSD
- St. Elizabeth Hospital
- Steve Manning Construction
- Stimpel-Wiebelhaus Associates
- Sunrise Excavating & Paving
- Tehama County
- Teichert Construction
- Trinity County
- Trinity County RCD
- Tullis, Inc.
- Turtle Bay Exploration Park
- United States Forest Service
- US Coast Guard
- Vector Engineering
- Vestra Resorces
- Westside Aggregates