- Brown & Caldwell
- Carollo Engineers
- David Evans & Assoc
- Davis Earth & Materials
- Dokken Engineering
- E-C Engineering
- Epic Consulting Engineers
- Gilbert Technical Svc
- HDR Inc
- Leighton & Assoc Inc
- Mactec
- PDG Oncore LLC
- Pountney Psomas
- San Diego Composites
- Syska Hennessy Group Inc
- Tait & Assoc
- Tri Star Technical Svc
- Winzler & Kelly Consulting
