| Business | Phone |
| Alt & Witzig Engineering 3725 Foundation Ct # A, South Bend 46628 | (574) 289-8378 |
| American Consulting Inc 300 N Michigan St # 321, South Bend 46601 | (574) 287-2231 |
| Christopher B Burke Engrng 340 Columbia St, South Bend 46601 | (574) 282-8001 |
| Criterium-Van Marter Engineers Po Box 6622, South Bend 46660 | (574) 273-0506 |
| Ken Herceg & Assoc Inc 211 W Washington St # 2100, South Bend 46601 | (574) 288-4580 |
| Lawson-Fisher Assoc 525 W Washington St # 200, South Bend 46601 | (574) 234-3167 |
| Lumm Engineers Inc 1317 Mishawaka Ave, South Bend 46615 | (574) 234-3192 |
| Mhm Assoc Inc 1920 Ridgedale Rd, South Bend 46614 | (574) 291-4793 |
| Professional Engineering Svc 3846 Appaloosa Ln, South Bend 46628 | (574) 277-4725 |
| Rhein Bach Inc 1657 Commerce Dr # 15b, South Bend 46628 | (574) 288-3535 |
| Rqaw Corp 120 W Lasalle Ave # 801, South Bend 46601 | (574) 232-8858 |
| Severn Trent Systems 1657 Commerce Dr # 2b, South Bend 46628 | (574) 287-3312 |
| Weaver Boos Consultants 630 E Bronson St, South Bend 46601 | (574) 232-4826 |