| Business | Phone |
| Shellenbarger Engineering Pc 5910 N Hagadorn Rd, East Lansing 48823 | (517) 337-8270 |
| Red Cedar Tech 4572 S Hagadorn Rd 1e, East Lansing 48823 | (517) 664-1137 |
| Hntb Michigan Engineering 333 Albert Ave 333, East Lansing 48823 | (517) 333-3330 |
| Malcolm Pirnie Inc 1500 Abbott Rd 210, East Lansing 48823 | (517) 337-0111 |