| Business | Phone |
| Aea Technology Engineering 1100 Jadwin Ave, Richland 99352 | (509) 946-5854 |
| Ares Corp 1100 Jadwin Ave 400, Richland 99352 | (509) 946-3300 |
| Bnl Technical Svc 719 Jadwin Ave 6, Richland 99352 | (509) 943-7005 |
| Burns & Mc Donnell Engineering 1305 Mansfield St, Richland 99352 | (509) 943-8852 |
| Trutech Llc 1201 Jadwin Ave, Richland 99352 | (509) 943-1251 |
| Vista Engineering 3000 George Washington Way #2c, Richland 99354 | (509) 375-3374 |
| Wastren Inc 1845 Terminal Dr 202, Richland 99354 | (509) 946-9434 |
| Yahsgs 660 George Washington Way # Y, Richland 99352 | (509) 946-9686 |
| Yahsgsllc 182 Bradley Blvd, Richland 99352 | (509) 946-9686 |
| Media Northwest Llc 1235 Gage Blvd 100, Richland 99352 | (509) 627-4300 |
| Dearing Co 2211 Humphreys St, Richland 99352 | (509) 946-0012 |
| Environmental Specialties Grp 309 Bradley Blvd, Richland 99352 | (509) 946-2927 |
| Global Technologies Inc 1050 Gilmore St A, Richland 99352 | (509) 943-1513 |
| Jacobs Engineering Group Inc 601 Williams Blvd 4a, Richland 99354 | (509) 943-9297 |
| Los Alamos Technical Assoc 309 Bradley Blvd 209, Richland 99352 | (509) 946-8100 |
| Lucas Engineering & Mngmt Svc 1201 Jadwin Ave 102, Richland 99352 | (509) 942-1080 |
| M & D Professional Svc 114 Columbia Point Dr A, Richland 99352 | (509) 943-1625 |
| Mactec 1100 Jadwin Ave # 300, Richland 99352 | (509) 946-0176 |
| Mc Entee Consulting 1708 Darby Pl, Richland 99352 | (509) 430-6171 |
| Mid-Columbia Engineering Inc 1305 Mansfield St 6, Richland 99352 | (509) 943-6706 |
| Namteknology 2256 Davison Ave, Richland 99354 | (509) 371-0910 |
| North Wind Environmental Inc 507 Knight St, Richland 99352 | (509) 943-7900 |
| Polestar Applied Technology 601 Williams Blvd 2a, Richland 99354 | (509) 946-8279 |
| Portage Environmental Inc 710 George Washington Way G, Richland 99352 | (509) 946-0202 |
| Project Enhancement Corp 1795 Snyder St, Richland 99354 | (509) 375-5000 |
| Shannon & Wilson Inc 303 Wellsian Way, Richland 99352 | (509) 946-6309 |