- Abdelmalek & Assoc
- ABS Consulting
- Alper Audi Inc
- Ambitech Engineering Corp
- Attebery Engineering Inc
- C I Flooring Solutions
- Clark Richardson & Biskup
- Code Consultants Inc
- Conlisk Engineering Mechanics
- Creve Coeur Airport Imprvmt
- Emerson Process Management
- Entech Engineering Inc
- Geotechnology Inc
- HDR Inc
- HDR Inc
- Industrial Automation Inc
- J Lu Intl
- Lillie & Co
- Penta Engineering Corp
- Penta Engineering Corp
- Sea LTD
- Wade Thouvenot & Moerchen Inc
