| Business | Phone |
| Kennedy-Jenks Consultants Inc 32001 32nd Ave S 100, Auburn 98001 | (253) 874-0555 |
| Len Gantz Surveying & Eng 3721 S 352nd St, Auburn 98001 | (253) 874-0158 |
| Phoenix Consulting Inc 102 37th St Nw, Auburn 98001 | (253) 887-8535 |
| Pyramid Engeneering 27630 Military Rd S, Auburn 98001 | (253) 852-1164 |
| Rupert Engineering 1519 W Valley Hwy N 101, Auburn 98001 | (253) 833-7776 |
| Visser Engineering Co Inc 3455 S 344th Way 230, Auburn 98001 | (253) 835-0810 |
| Hardy Engineering 120 37th St Ne, Auburn 98002 | (253) 735-6488 |
| Mathews Consulting Group 2 Auburn Way N 209, Auburn 98002 | (253) 804-0737 |
| Omni Fab Llc 3219 C St Ne, Auburn 98002 | (253) 931-5151 |
| Poe Engineering Inc 1314 8th St Ne 201, Auburn 98002 | (253) 833-4052 |
| Transportation Consulting 1607 E Main St, Auburn 98002 | (253) 931-0506 |
| Welsh Commissioning Group 4508 Auburn Way N E, Auburn 98002 | (253) 856-3322 |
| Spears Engineering-Technical 5115 Auburn Way S, Auburn 98092 | (253) 833-7967 |