| Business | Phone |
| Braden Professional Engnrng 141 Stony Cir # 220, Santa Rosa 95401 | (707) 568-6501 |
| O'Mahoney & Myer Electrical 613 4th St, Santa Rosa 95404 | (707) 527-6396 |
| Suite 16 Electrical Engineerng 463 Aviation Blvd, Santa Rosa 95403 | (707) 522-8175 |
| Bruce Wishard Pe 437 Carrillo St, Santa Rosa 95401 | (707) 526-0606 |