| Business | Phone |
| Cogema Engineering Corp 2460 Garlick Dr, Richland 99354 | (509) 375-4003 |
| General Engineering Labs 524 Warehouse St, Richland 99352 | (509) 943-2121 |
| Gforce Engineering & Tech 1933 Jadwin Ave, Richland 99354 | (509) 943-7944 |
| Hiline Engineering & Fab 2105 Aviator St, Richland 99354 | (509) 943-9043 |
| Parsons Infrastructure & Tech 1955 Jadwin Ave 330, Richland 99354 | (509) 946-0415 |
| Redmann Qual Engineering Svc 1693 April Loop, Richland 99354 | (509) 554-0578 |