| Business | Phone |
| C P Engineering 7115 Dry Creek Ct, Longmont 80503 | (303) 652-2686 |
| Engineers Without Borders Usa 1880 Industrial Cir, Longmont 80501 | (303) 772-2723 |
| Gorton Scott Engineering 2727 Nelson Rd # N106, Longmont 80503 | (720) 652-0349 |
| Optical Engineering Assoc 7156 Mount Meeker Rd, Longmont 80503 | (303) 527-3726 |
| Tamur Engineering 832 Sherman St, Longmont 80501 | (303) 772-5404 |
| Warner Precision Engineering 802 Sunset St, Longmont 80501 | (303) 772-6065 |