| Business | Phone |
| Electrical Control Integrators 3610 Bending Brae Ct, Brookfield 60513 | (708) 282-9669 |
| Ea Power Group 3800 Madison Ave, Brookfield 60513 | (708) 387-7604 |
| Marsala Corp 4527 Dubois Blvd, Brookfield 60513 | (708) 485-3500 |
| White House Electric Co 4138 Vernon Ave, Brookfield 60513 | (708) 485-8124 |