| Business | Phone |
| Haas & Assoc 526 Franklin St, Michigan City 46360 | (219) 872-9407 |
| John A Doyle & Assoc Inc 2322 E Michigan Blvd, Michigan City 46360 | (219) 872-2221 |
| K Plus 601 Franklin St, Michigan City 46360 | (219) 878-1600 |
| Zolvinski Engineering 815 Franklin St, Michigan City 46360 | (219) 874-0230 |