| Business | Phone |
| Acton-Mickelson Environmental 5175 Hillsdale Cir # 100, El Dorado Hills 95762 | (916) 939-7550 |
| Dewante & Stowell 5090 Robert J Mathews Pkwy, El Dorado Hills 95762 | (916) 941-8999 |
| Fatigue Concepts El Dorado Hills 95762 | (916) 933-3361 |
| C Frank Bradham El Dorado Hills 95762 | (916) 933-1962 |
| International Quality Inst El Dorado Hills 95762 | (916) 933-2318 |
| Software Carpenters Inc 3516 Falkirk Way, El Dorado Hills 95762 | (916) 933-3434 |
| Tri-Com Refrigeration Inc 1107 Investment Blvd, El Dorado Hills 95762 | (916) 941-0317 |