| Business | Phone |
| Florence & Hutcheson Inc Fort Smith 72901 | (479) 782-7373 |
| Hsa Engineering Consulting 5701 Euper Ln # A, Fort Smith 72903 | (479) 452-8922 |
| Hudson Engineering 2012 Massard Rd, Fort Smith 72903 | (479) 452-6281 |
| Jay Wiechert Manufacturer 719 S 10th St, Fort Smith 72901 | (479) 782-5587 |
| Leraris Engineering 5400 Free Ferry Rd, Fort Smith 72903 | (479) 452-5822 |
| Douglas C Melton Jr 4520 Phoenix Ave, Fort Smith 72903 | (479) 649-7111 |
| Morrison-Shipley Engineers Inc 5704 Euper Ln, Fort Smith 72903 | (479) 452-1933 |
| Morrison-Shipley Engineers Inc 6901 Dallas St # A, Fort Smith 72903 | (479) 452-1933 |
| U S Infrastructure 115 N 10th St # H119, Fort Smith 72901 | (479) 785-0055 |
| Atkins Benham Inc 222 S 16th St, Fort Smith 72901 | (479) 785-5801 |
| Automation Engineering 4301 S 16th St, Fort Smith 72901 | (479) 646-9994 |
| Burrows & Assoc Engineering 523 Garrison Ave, Fort Smith 72901 | (479) 783-8016 |
| Edm Consultants Inc 1230 Wicklow Dr, Fort Smith 72903 | (479) 782-0474 |