| Larrymore Organization Inc | HVA + RBC, CBC, PLB +1 | 1994 | Active |
| Leverage LLC | HVA + ADS | 2019 | Active |
| M&M Industries Inc | HVA + GFC | 2020 | Active |
| Mason S Heating & Cooling Inc | HVA + RBC, CBC, HIC +1 | 2011 | Active |
| Mechanical Air Services Inc | HVA + GFC | 1996 | Active |
| Mechanical Service Solutions Corporation | HVA + PLB, GFC, ELE | 2014 | Active |
| Mechollage Inc | HVA + CBC, RBC, ELE +1 | 2010 | Active |
| Metro Mechanical Corp | HVA + GFC | 2002 | Active |
| Mid Atlantic Companies Inc | HVA + GFC | 1998 | Active |
| Mike Straddeck & Associates | HVA + GFC | 2005 | Active |
| MTS Refrigeration LLC | HVA | 2019 | Active |
| Neptune Mechanical LLC | HVA + GFC, PLB | 2024 | Active |
| New Age Construction Of Tidewater Inc | HVA + CBC, GFC | 2024 | Active |
| Newbern Mechanical Company Inc | HVA + GFC | 2008 | Active |
| Ocean Air Heating & Cooling LLC | HVA + GFC | 2003 | Active |
| Paragonn Incorporated | HVA + RBC, CBC, PLB +2 | 2013 | Active |
| Paul S Heating And Air Conditioning LLC | HVA + GFC | 2009 | Active |
| Pembroke Mechanical Group Inc. | HVA | 2025 | Active |
| Performance Mechanical Inc | HVA + GFC, RBC, CBC +2 | 2015 | Active |
| Preferred Climate Heating & Cooling LLC | HVA | 2020 | Active |
| Quality Contracting Inc | HVA + CBC, ELE | 2011 | Active |
| R.J.C. Inc | HVA + ELE, GFC | 2006 | Active |
| Rescue Air LLC | HVA | 2023 | Active |
| RSM Inc | HVA | 2010 | Active |
| Runnn Cool LLC | HVA | 2016 | Active |
| Russell A Jackson LLC | HVA + PLB, CIC, HIC +1 | 2010 | Active |
| Salmon Services Inc | HVA | 2003 | Active |
| Scott Fisher Inc | HVA + GFC | 2021 | Active |
| Seashore HVAC Specialists LLC | HVA | 2022 | Active |
| Sens Air Conditioning & Heating Inc | HVA + GFC | 2011 | Active |
| Sensible Solutions HVAC Services LLC | HVA | 2016 | Active |
| Serach LLC | HVA | 2023 | Active |
| Shoreline Mechanical Inc | HVA + GFC | 1993 | Active |
| Smith And Keene Home Services LLC | HVA + ELE, PLB, GFC | 2024 | Active |
| Solar Services Inc | HVA + RBC, CBC, PLB +3 | 1997 | Active |
| Southernwind Enterprises LLC | HVA + PLB, GFC | 2026 | Active |
| Stillman Electric Corporation | HVA + ELE, GFC | 1995 | Active |
| Stone Cold Mechanical LLC | HVA | 2026 | Active |
| Stone Free LLC | HVA | 2017 | Active |
| Strawbridge Mechanical Services Inc | HVA | 2009 | Active |
| Structural Mechanical Inc | HVA + PLB, GFC | 2003 | Active |
| Succor Inc | HVA + LPG, NGF, GFC | 2011 | Active |
| Sun Mechanical LLC | HVA + AES, GFC | 2012 | Renew by Nov 30, 2026 |
| T & B Climate Control LLC | HVA | 2023 | Active |
| T R Ricks Incorporated | HVA, REF | 2001 | Active |
| Tango Bravo Mechanical LLC | HVA | 2023 | Active |
| Thads Sons Heating & Air Conditioning LLC | HVA | 2016 | Active |
| The Install Experts LLC | HVA + RBC | 2015 | Active |
| The Kitchen Guys LLC | HVA + CBC | 2022 | Active |
| Thermo-Trol Systems Inc | HVA + NGF, LPG, ELE +1 | 1996 | Renew by Nov 30, 2026 |
| Tidewater Home Comfort LLC | HVA | 2026 | Active |
| Tony S Quality Air Care Inc | HVA | 2008 | Renew by Dec 31, 2026 |
| True Air Solution LLC | HVA | 2025 | Active |
| United Mechanical Contractors Inc | HVA, REF + GFC | 2006 | Active |
| Ves Mechanical LLC | HVA | 2021 | Active |
| Virginia Beach Mechanical Services Incorporated | HVA + PLB, GFC | 1993 | Active |
| Virginia Ecomechanical Hvac-R Solutions LLC | HVA | 2025 | Active |
| Virginia Ecomechanical Hvacr LLC | HVA | 2026 | Active |
| Virginia Mechanical Equipment Corp | HVA | 2016 | Active |
| Virginia Mechanical Services LLC | HVA + GFC | 2025 | Active |
| W E Care Insulation & Air LLC | HVA + PLB, ELE | 2016 | Active |
| Waypoint Mechanical Service LLC | HVA + GFC, PLB | 2020 | Active |
| White & Wallace LLC | HVA | 2006 | Active |
| White Goods Services Inc | HVA + GFC | 2000 | Active |
| Wiz Management LLC | HVA | 2026 | Active |