| Firm | Month/Yr. Joined | Member Type | City |
| Myriad Engineering, Inc Inc. | 01/2021 | Engineering | Sacramento |
| Hull, Inc. | 08/2020 | Engineering | Truckee |
| Unico Engineering, Inc. | 08/2020 | CM/PM/Survey | Folsom |
| KCM Engineering, Inc. | 07/2020 | Engineering | Sacramento |
| Culp & Tanner, Inc. | 12/2019 | Civil Engineering | Chico |
| Redefined Horizons Surveying | 11/2019 | Surveying | Stockton |
| Jacobs Engineering Group, Inc. | 10/2019 | Engineering | Sacramento |
