| Employer | City | |
| Alternative Energy Resources | Various Locations | View Profile |
| American Residential Services | Aurora | View Profile |
| American Trainco, Inc | Englewood | View Profile |
| Benjamin Franklin Plumbing | Dillon | View Profile |
| Cator, Ruma, & Assoc. | Lakewood | View Profile |
| Climate Engineering, Inc. | Denver | View Profile |
| CMS Mechanical Services, Inc. | Windsor | View Profile |
| Construct Corps | Various Locations | View Profile |
| Direct Energy - US Home Services | Various Locations | View Profile |
| Economy Air Conditioning & Heating, Inc. | Englewood | View Profile |
| Electronic Concepts Inc. | Fort Collins | View Profile |
| Emcor Group | Various Locations | View Profile |
| Engineering Economics, Inc. | Golden | View Profile |
| ESCO - Energy Services of Colorado | Westminster | View Profile |
| First Service Networks | Various Locations | View Profile |
| Fortney Refrigeration Co. | Grand Junction | View Profile |
| GMH Communities | Various Locations | View Profile |
| Grand Lake Plumbing Co. | Grand Lake | View Profile |
| Guarantee Electrical Contrng | Aurora | View Profile |
| Heating & Plumbing Engineers, Inc. | Colorado Springs | View Profile |
| Honeywell | Various Locations | View Profile |
| Hussmann | Mounumont | View Profile |
| Ingersoll Rand Climate Control Technologies | Various Locations | View Profile |
| Johnson Controls Inc, Controls Group | Various Locations | View Profile |
| KBR | Various Locations | View Profile |
| Mai Mechanical Corporation | Commerce City | View Profile |
| Maicon LLC | Longmont | View Profile |
| McQuay International/McQuay Service | Various Locations | View Profile |
| ME-Engineers, Inc. | Wheat Ridge | View Profile |
| MEP Jobs - Customer Fulfillment | Various Locations | View Profile |
| NES Rentals Holdings, Inc | Various Locations | View Profile |
| New Electric Inc | Avon | View Profile |
| Nexant, Inc | Boulder | View Profile |
| NORESCO | Various Locations | View Profile |
| Plumbing Systems Inc | Avon | View Profile |
| Pyramid Mechanical Inc | Parker | View Profile |
| Reliable Electrical Services, Inc. | Woodland Park | View Profile |
| RK Mechanical, Inc. | Denver | View Profile |
| San Juan Construction | Montrose | View Profile |
| Service Experts - Bartels Westside | Denver | View Profile |
| Service Logic | Denver | View Profile |
| Shawmut Design and Construction | Various Locations | View Profile |
| Siemens Building Technologies | Various Locations | View Profile |
| Siemens Building Technologies, Inc. | Various Locations | View Profile |
| The Linc Group | Various Locations | View Profile |
| Trane Commercial Systems | Various Locations | View Profile |
| Transwestern | Various Locations | View Profile |
| University of Colorado at Boulder | Boulder | View Profile |
| URS Corporation | Denver | View Profile |
| West Electric Group, Inc. | Colorado Springs | View Profile |