| Business | Phone |
| Huff & Huff Environmental 512 W Burlington Ave 100, La Grange 60525 | (708) 588-1409 |
| L J Kafer Assoc 7925 Bielby Ln, La Grange 60525 | (708) 246-1772 |
| Mac Brady Assoc Inc 309 W Hillgrove Ave, La Grange 60525 | (708) 354-1343 |
| Mees Engineering Systems Inc 7955 Bielby Ln, La Grange 60525 | (708) 246-6169 |
| Montana Design Svc 6236 Edgebrook Ln W, La Grange 60525 | (708) 246-9090 |
| Sts Inc 500 E Plainfield Rd, La Grange 60525 | (708) 482-7080 |
| Tallarico Vince 1312 59th Pl, La Grange 60525 | (708) 352-0803 |
| John R Nalbach Engineering Co 621 E Plainfield Rd, La Grange 60525 | (708) 579-9100 |
| Midwest Operating Engineers 6150 Joliet Rd, La Grange 60525 | (708) 482-7300 |
| Midwest Operating Engr Benefit 6140 Joliet Rd, La Grange 60525 | (708) 579-3621 |
| Randolph & Assoc 120 E Burlington Ave, La Grange 60525 | (708) 354-7684 |
| Sharma & Assoc Inc 29 W Plainfield Rd, La Grange 60525 | (708) 588-9871 |
| Sharma & Assoc Inc 1040 S La Grange Rd, La Grange 60525 | (708) 588-9876 |
| Younger Engineering Svc 324 S Spring Ave, La Grange 60525 | (708) 352-7975 |