- Alan Plummer Assoc Inc
- Alliance Geotechnical Group
- Carter & Burgess Inc
- Dikita Enterprises
- Ejes Inc
- Mas Tex Engineering
- Paragon Project Resources Inc
- Pate Engineers Inc
- PELTON Marsh & Kinsella
- Ronald A Roberts Assoc Inc
- Southwest Testing Laboratories
- Terracon Consulting Inc
- Williams Russell & Johnson Inc
