| Business | Phone |
| Ackerman-Practicon 801 E Charleston Rd, Palo Alto 94303 | (650) 965-1000 |
| Davidson Engineering Inc 445 Sherman Ave # X, Palo Alto 94306 | (650) 493-2400 |
| Function Engineering Inc 635 High St, Palo Alto 94301 | (650) 326-8834 |
| Rhombus Consultants Group 1121 San Antonio Rd, Palo Alto 94303 | (650) 691-1142 |
| Tricad Engineering 4020 Fabian Way # D, Palo Alto 94303 | (650) 494-6009 |