| Business | Phone |
| Ceridian Employer Svc 1730 Minor Ave 1200, Seattle 98101 | (206) 224-9400 |
| Real Time Performance 603 Stewart St 500, Seattle 98101 | (206) 749-9000 |
| Egrometrics & Applied Research 1225 23rd Ave E, Seattle 98112 | (206) 324-6777 |
| Buck Consultants 701 5th Ave 3210, Seattle 98104 | (206) 748-6900 |
| H R Group Intl 500 Union St, Seattle 98101 | (206) 652-2400 |
| H R Insite Seattle 98122 | (206) 860-9280 |
| Praxis HR 500 Union Street, Suite 320, Seattle 98101 | (206) 501-4350 |