| Employer | City | |
| Air Plus Inc. | Van Nuys | View Profile |
| All Temperatures Controlled | Chatsworth | View Profile |
| Artic Mechanical, Inc. | Rancho Cucamonga | View Profile |
| Bay Air Systems | Concord | View Profile |
| Christian Brothers Heating & Air Conditioning, Inc | Mira Loma | View Profile |
| CITY OF LOS ANGELES | Los Angeles | View Profile |
| Comverge, Inc. | Various Locations | View Profile |
| Control Air Conditioning | Anaheim | View Profile |
| County Air | Orange | View Profile |
| Direct Energy - US Home Services | Various Locations | View Profile |
| Diversified Refrigeration Company | Valley Springs | View Profile |
| Energy Labs Inc. | San Diego | View Profile |
| Hussmann | Various Locations | View Profile |
| MEP Jobs - Customer Fulfillment | Various Locations | View Profile |
| Mike Diamond Enterprises | Culver City | View Profile |
| Montage Laguna Beach | Laguna Beach | View Profile |
| Pacific Coast Trane Service | Sunnyvale | View Profile |
| Pacific Rim Mechanical | San Diego | View Profile |
| R. J. Lanthier Co., Inc. | Escondido | View Profile |
| Rec Solar | San Luis Obispo | View Profile |
| Service Solutions Group | Various Locations | View Profile |
| Stantec | Various Locations | View Profile |
| Stantec | Various Locations | View Profile |
| The Camden Group Inc. | Pleasanton | View Profile |
| The Linc Group | Various Locations | View Profile |
| TMCI, Inc. | San Bernardino | View Profile |
| ZODIAC HVAC INC. | Van Nuys | View Profile |