| Business | Phone |
| American Tower Scanning 3560 Pine Grove Ave # 497, Port Huron 48060 | (810) 984-3116 |
| Bmj Engineers & Surveyors 519 Huron Ave, Port Huron 48060 | (810) 984-5596 |
| Dortmann Engineering Assoc 2120 12th Ave, Port Huron 48060 | (810) 984-3797 |
| Dunn Construction Engineering 2240 10th, Port Huron 48060 | (810) 984-5131 |
| Hennessey Engineers Inc 920 7th St, Port Huron 48060 | (810) 985-4848 |
| Johnson & Anderson Inc 3910 Lapeer Rd, Port Huron 48060 | (810) 987-7820 |
| Tetra Tech 227 Huron Ave, Port Huron 48060 | (810) 966-1900 |