| Business | Phone |
| Bellevue Security Inc Po Box 77462, Seattle 98177 | (425) 747-4466 |
| Washington Protective Svc Co Po Box 94152, Seattle 98124 | (206) 568-5049 |
| Hwa Inc 1809 7th Ave 1400, Seattle 98101 | (206) 624-6889 |
| On Gard Security Seattle 98101 | (206) 405-4273 |
| Western Wa Merchant Patrol Inc Seattle 98101 | (206) 903-8138 |
| Risk Management Svc 810 3rd Ave, Seattle 98104 | (206) 625-0272 |
| Src Private Security Seattle 98104 | (206) 621-7203 |
| Parker Corporate Svc 14900 Interurban Ave S, Seattle 98168 | (206) 621-0505 |
| Security Services Northwest 9640 Martin Luther King Jr Way, Seattle 98118 | (206) 721-2644 |
| National Guardian Security Svc 3033 16th Ave W, Seattle 98119 | (206) 443-8879 |
| Northwest Protective Svc 2700 Elliott Ave, Seattle 98121 | (206) 448-4040 |
| North County Alarm & Patrol Seattle 98125 | (206) 362-7111 |
| Seattle Security Inc 13751 Lake City Way Ne 114, Seattle 98125 | (206) 763-8740 |
| Northwest Security Svc 14824 Westminster Way N, Seattle 98133 | (206) 365-0760 |
| Reliant Security Llc 4634 E Marginal Way S C103, Seattle 98134 | (206) 382-0277 |
| Puget Sound Executive Svc Inc Po Box 77462, Seattle 98177 | (206) 417-8282 |
| Washington State Security Po Box 77438, Seattle 98177 | (206) 361-6210 |
| Olympic Security Svc 631 Strander Blvd A, Seattle 98188 | (206) 575-8531 |
| Wackenhut Corp 1035 Andover Park W, Seattle 98188 | (253) 872-1555 |