| Business | Phone |
| Abkj 800 5th Ave 3800, Seattle 98104 | (206) 340-0118 |
| Adh Engineering Seattle 98101 | (206) 390-8374 |
| Ahbl Civil & Structural 316 Occidental Ave S 320, Seattle 98104 | (206) 267-2425 |
| Ahbl Inc Seattle 98101 | (206) 623-0242 |
| Bennett Staheli Engineers 126 Nw Canal St 300, Seattle 98107 | (206) 633-0213 |
| Bush Roed & Hitchings Inc 2009 Minor Ave E, Seattle 98102 | (206) 323-4144 |
| D Wick Engineers Seattle 98125 | (206) 440-0755 |
| Duncanson Co 145 Sw 155th St 102, Seattle 98166 | (206) 244-4141 |
| Harris & Assoc 10740 Meridian Ave N, Seattle 98133 | (206) 417-5125 |
| Reza Golampor Pe Seattle 98115 | (206) 729-1167 |
| Infrastructure Engineers Inc 1402 3rd Ave, Seattle 98101 | (206) 621-0053 |
| Jacobs Associates 811 1st Ave, Seattle 98104 | (206) 682-0081 |
| Jordan Associates Inc Seattle 98104 | (206) 682-8794 |