| Business | Phone |
| Upgradient Environmental 3369 Kimberly Rd, Cameron Park 95682 | (530) 677-3055 |
| Advanced Resource Solutions 3420 Coach Ln, Cameron Park 95682 | (530) 676-1095 |
| Concept Design 5015 Sagan Ct, Cameron Park 95682 | (916) 806-9582 |
| Minshew Engineering 3320 Wood Ln, Cameron Park 95682 | (530) 672-1245 |
| Pacific Legacy Inc 3081 Alhambra Dr, Cameron Park 95682 | (530) 677-9713 |