- Ashkar Engineering Corp
- Benchmark Engineering Corp
- Bozeman Engineering Inc
- Burk-Kleinpeter Inc
- Civil Systems Engineering Inc
- Civil Systems Engineering Inc
- Diab Engineering
- Engineering Diagnostics Inc
- Engineering Diagnostics Inc
- Henderson Structural Inc
- Henderson Structural Inc
- Infrastructure Associates
- Infrastructure Associates
- JMA Technology
- JMA Technology
- Kirst Kosmoski Inc
- Kirst Kosmoski Inc
- Kobs Engineering
- Kobs Engineering
- Mc Donough Engineering Corp
- Mc Donough Engineering Corp
- Nelson Architectural Engineers
- Nelson Architectural Engineers
