| Business | Phone |
| Sts Consultants Ltd 401 S Washington Sq 103, Lansing 48933 | (517) 622-2300 |
| Capital Consultants/Designwrks 725 Prudden St, Lansing 48906 | (517) 371-1200 |
| Clark-Trombley-Randers Cnsltng 6105 W St Joe Hwy 200, Lansing 48917 | (517) 886-0550 |
| Rge Consulting 3314 Parkview Ave, Lansing 48910 | (517) 394-1372 |
| Parsons Brinckerhoff Constr 6015 W St Joe Hwy, Lansing 48917 | (517) 327-7848 |
| Pma Consultants Llc 120 N Washington Sq, Lansing 48933 | (517) 482-9401 |