| Business | Phone |
| Mark Iv Engineering 620 E Riley Thompson Rd, Muskegon 49445 | (231) 766-2385 |
| Scope Engineering Inc 1558 Woodside Rd, Muskegon 49441 | (231) 206-0945 |
| Creative Engineering 175 W Farr Rd, Muskegon 49444 | (231) 798-3874 |
| Daj Engineering Inc Pc 2129 E Swanson Ct, Muskegon 49444 | (231) 733-5443 |
| Enteq Engineering Inc 1052 Randall Rd, Muskegon 49441 | (231) 798-2800 |
| Executive Engineering 947 Sherwood Rd, Muskegon 49441 | (231) 755-4075 |
| Automation Engineering & Dsgn 5155 W Mcmillan Rd, Muskegon 49445 | (231) 766-2921 |