- Black & Veatch
- Bonn Corp
- Borm Associates Inc
- Carollo Engineers
- Carter & Burgess Inc
- Ficcadenti & Waggoner Inc
- Harris Consulting Engineers
- HDR Inc
- I A Nama & Assoc
- International Consulting Engr
- JNLV Consulting Co
- Kennedy/Jenks Consultants
- Kimley-Horn & Assoc Inc
- Modern Technology Solutions
- Sigma Mechanical Engineering
- Stanley Consultants Inc
- Starburst Vending
- URS Corp
- URS Corp
- Washington Group Intl
- Westin Engineering Inc
