| Business | Phone |
| Aerospace Testing Engineering 6010 Airport Way S, Seattle 98108 | (206) 763-6087 |
| Anzus Technology Intl 2151 N Northlake Way 200, Seattle 98103 | (206) 547-2332 |
| Blasland Bouck & Lee Inc 2300 Eastlake Ave E, Seattle 98102 | (206) 325-5254 |
| Caroolo Engineers 111 3rd Ave S 2500, Seattle 98104 | (206) 583-8341 |
| Cle Engineering Inc 3717 Beach Dr Sw, Seattle 98116 | (206) 938-0223 |
| Cooper Zietz Engineers 220 S River St # 12, Seattle 98108 | (206) 768-8500 |
| Eighty Three King 83 S King St, Seattle 98104 | (206) 343-5464 |
| Embedded Engineering Svc 3236 13th Ave W, Seattle 98119 | (206) 691-0650 |
| Brn Engineering 2101 9th Ave 202, Seattle 98121 | (206) 223-6446 |
| Filter Engineering Inc 16 S Michigan St, Seattle 98108 | (206) 762-8799 |
| Gerhard Engineering 1810 N 55th St, Seattle 98103 | (206) 632-1810 |
| Huitt-Zollars Inc 814 E Pike St, Seattle 98122 | (206) 324-5500 |
| Hunt Group 5666 Sw Spokane St, Seattle 98116 | (206) 938-4300 |
| In Vision Design 10144 Rainier Ave S, Seattle 98178 | (206) 772-4364 |
| Integrated Design Engineers 1424 4th Ave 909, Seattle 98101 | (206) 264-1121 |
| Wastesite.Com 11750 33rd Pl Ne, Seattle 98125 | (206) 417-6330 |
| Jake Traffic Engineering Inc 7731 8th Ave Sw, Seattle 98106 | (206) 762-1978 |
| Jon Dalan Chemical Engineering 1711 N 163rd St, Seattle 98133 | (206) 542-5053 |