| Business | Phone |
| Egerer Forensic Engineering 2906 Nodular Dr, Saginaw 48601 | (989) 754-9980 |
| H E Svc 225 E Morley Dr, Saginaw 48601 | (989) 753-0554 |
| Mapro 5815 Bay Rd, Saginaw 48604 | (989) 249-1520 |
| Troy Design Inc 1475 S Washington Ave, Saginaw 48601 | (989) 399-9910 |
| Spicer Group 230 S Washington Ave, Saginaw 48607 | (989) 754-4717 |
| Trident Victory Corp 5450 East Rd, Saginaw 48601 | (989) 777-4784 |
| Snyder & Staley Engineers 3160 Christy Way, Saginaw 48603 | (989) 797-1710 |
| Snyder Engineering 1049 Cranbrook Dr, Saginaw 48638 | (989) 793-7782 |