| Business | Phone |
| Bruce Engineering Inc 1300 E Us Highway 14-16, Gillette 82716 | (307) 686-2252 |
| Carol Chadwick Pe 1041 Teton Cir, Gillette 82716 | (307) 680-1772 |
| Worthington Lenhart Carpenter 801 E 4th St 6, Gillette 82716 | (307) 682-6554 |
| Stetson Engineering 4901 S Douglas Hwy 3, Gillette 82718 | (307) 682-8936 |
| Pca Engineering Inc 4506 Wigwam Blvd A, Gillette 82718 | (307) 687-0600 |