| Business | Phone |
| Aardvarck Engineering Dsl Line 150 Nickerson St 201, Seattle 98109 | (206) 281-7379 |
| Cedtech 2615 4th Ave # 370, Seattle 98121 | (206) 443-0949 |
| Evergreen Engineers Northwest 4052 Ne 95th St, Seattle 98115 | (206) 525-1071 |
| F A Thorn & Assoc 4730 48th Ave Sw, Seattle 98116 | (206) 938-3616 |
| Halvorson Beach & Bower Inc 1833 N 105th St # 305, Seattle 98133 | (206) 527-0501 |
| Frank Alberti & Assoc 4015 W Prosper St, Seattle 98199 | (206) 285-3490 |
| Gear Engineers Inc Seattle 98107 | (206) 783-3919 |