| Business | Phone |
| Jd3 Engineering 8207 Callaghan Road, Suite 230, San Antonio 78230 | (210) 541-9446 |
| A H Coordination Consulting 7711 Callaghan Rd 719, San Antonio 78229 | (210) 344-9060 |
| Arinc Inc 100 Ne Loop 410 700, San Antonio 78216 | (210) 733-7559 |
| Atkr Inc 506 Woodway Forest Dr, San Antonio 78216 | (210) 494-5178 |
| Camp Dresser & Mc Kee Inc 1777 Ne Loop 410 704, San Antonio 78217 | (210) 826-3200 |
| Carter & Burgess Inc 9311 San Pedro Ave, San Antonio 78216 | (210) 525-7931 |
| Ch2m Hill 9311 San Pedro Ave 800, San Antonio 78216 | (210) 377-3081 |
| Lackey Brothers Lp 3710 Mary Mont Dr, San Antonio 78217 | (210) 651-1011 |
| Parsons Infrastructure & Tech 901 Ne Loop 410 610, San Antonio 78209 | (210) 828-4900 |
| Psi 11910 Warfield St, San Antonio 78216 | (210) 363-4881 |
| Psi 401 Isom Rd, San Antonio 78216 | (210) 366-4699 |
| R A Nicol & Assoc 100 E Agarita Ave, San Antonio 78212 | (210) 785-9515 |
| Tetra Tech 501 Soledad St, San Antonio 78205 | (210) 226-2922 |
| Thuss Consulting Inc 13706 Bluffmont, San Antonio 78216 | (210) 499-1480 |
| Tosuma Technology Consulting 122 Lovera Blvd, San Antonio 78212 | (210) 867-8780 |
| Watertechnology Services 3404 River North Dr, San Antonio 78230 | (210) 696-2354 |
| Wkh Consulting Engineers 8622 Crownhill Blvd 201, San Antonio 78209 | (210) 826-6392 |
| Aeroprojects 2031 Oak Crown, San Antonio 78232 | (210) 490-7359 |
| Aviation Consulting 16219 Santa Cathrena, San Antonio 78232 | (210) 496-7715 |
| Black & Veatch 14100 San Pedro Ave 410, San Antonio 78232 | (210) 404-1409 |
| C4e Inc 11901 Toepperwein Rd 904, San Antonio 78233 | (210) 225-4333 |
| Clive Samuels & Assoc 6800 Park Ten Blvd 246e, San Antonio 78213 | (210) 785-9500 |
| Cost Estimate Resources 8205 Roughrider Dr, San Antonio 78239 | (210) 651-1133 |
| Cost Containment Engineering 9222 Linbrooke, San Antonio 78250 | (210) 509-0825 |
| Rjn Group Inc 8930 Fourwinds Dr # 102, San Antonio 78239 | (210) 651-1661 |
| Rkg Enterprises Inc 1810 Eagle Mdw, San Antonio 78248 | (210) 408-1681 |
| Ch2m Hill 621 Kelly Afb, San Antonio 78242 | (210) 922-9676 |
| S R Birch Consulting 7111 Washita Way, San Antonio 78256 | (210) 698-4470 |