- A.M. Painting, LLC
- ABC Imaging
- ACE Fire Extinguisher
- Adcock’s Systems, LLC
- Admiral Security Services
- Adonai Consultants, Inc.
- Affordable Signs & Banners
- Air Cleaning Technologies, Inc
- Albireo Energy
- Allied Universal Security Services
- American Pest
- American Window & Building Cleaning, Inc.
- Ames, Inc.
- Arc Environmental, LLC
- Arian Tab Services, Inc.
- Atelier Architects
- Atlantic Consulting
- Atlantic Eletric Company
- Atlantic Parking
- Bennett Mechanical Services
- Best Plumbing
- Boland Services
- Boland
- Bond Water Technologies
- BrightView Landscapes Services, Inc.
- Building Engines
- Capitol Concierge, Inc.
- Capitol Pest
- Carol Poremski Design
- CDS Mechanical
- Chesapeake Cooler Company / Hague Water
- Chesapeake Systems
- Choice Plantings
- Chuck Biagi’s Carpet Care Plus
- Clark Construction
- Classic Concierge
- Colonial Parking
- Commercial Energy Systems, Inc.
- Constellation
- Construction Insight, Inc.
- Daikin Applied
- Datawatch Systems, Inc.
- DC SustainablieEnergy Unit
- Dominion ElevatorInspection Services
- Dominion Mechanical
- Eagle Mat & Flooring Products
- eAsset Solutions
- Eastern Fire Protection
- ECS Capitol Services
- EESCO Pump & Valve
- ElevatorControl Service
- EMCOR Services Combustioneer
- Encore Décor, Inc.
- Envision Realty
- Electronic Tenant Solutions
- EV-Air Tight, Shoemaker, Inc.
- Extra Clean, Inc.
- Federal Lock and Safe, Inc.
- Fidelity Engineering
- Finish It Green
- Flynn Architectural Finishes
- Fooda
- Freestate Electrical Companies
- Fujitec America, Inc.
- Furbish
- Galley Foods
- Gelberg Signs
- Girard Engineering
- Grainger Industrial Supplies
- GaradaWorld Security Services
- H. Bloom
- Hastings Architectural Restoration
- Havtech
- Underwriters Laboratories
- Heartline Fitness Systems
- Hillmann Consulting, LLC
- Impact Maintenance Services
- Impact Office Supplies
- Interactive Touchscreen Solutions
- InterPark
- ITC, Inc.
- Jack Stone Signs
- James J. Madden, Inc.
- Jan Ferguson, Inc.
- Johnson Controls, Inc.
- JPG Plumbing
- Journeyman Mechanical
- Just-Rite Equipment
- Kamp Pendleton
- Kastle Systems
- KCS Landscape Management, Inc.
- Kelly Generator
- & Equipment, Inc.
- Kelly HVAC, Inc.
- kmG Hauling
- Kone, Inc.
- Landmark Parking
- LAZ Parking Mid-Atlantic, Inc.
- Leonard Paper Company
- Lock Technology, Inc.
- Lord Baltimore Uniform
- Lorton Stone
- Lutron
- iES - MACH Energy
- Magnolia Plumbing
- Malone Emergency Generator Service, LLC
- Mannington Commercial
- McQuay International
- Mechanical Systems, Inc.
- Mid-Atlantic Fire Protection
- Mona Electric Group, Inc.
- Nelbud Services
- Noyes Air Conditioning Contractors, Inc.
- Orkin, LLC
- Otis Elevator Company
- Overhead Door Company of Washington, DC
- Owl Pest Prevention
- P&R Enterprises, Inc.
- P2 Communications Management
- Painting & Decorating
- Palm Facility Services
- Pepco
- Pioneer Building Services
- Ponce Painting, LLC
- Potomac Elevator Company
- Pratum Greenroof
- Pritchett Controls, Inc.
- Prospect Waterproofing
- QESPRO Environmental Services
- Quality Sealants, Inc.
- Red Coats, Inc.
- Schneider Electric
- Rescue One Training for Life
- Ritual
- Rohan ConstructionGroup, Inc.
- ROKK Architecture
- Rolling Greens, Inc.
- Ruppert Landscape
- S&S Construction, LLC
- S. Albert Glass
- SaniGLAZE
- Schindler Elevator
- Scoops2U
- Secom, LLC
- SecuritasServices USA, Inc.
- See Contracting, Inc.
- Senate Glass & Door
- Service Machine Shop
- Servicon Facilities & Mechanical Services
- Sherwin Williams
- Siemens Building Technologies, Inc.
- Simpli
- SOLID Surface Care, Inc.
- Steritech
- Stuart Dean
- Superior Plantings
- Synergy Fitness Group
- Tadjer-Cohen-Edelson Associates
- Tate Engineering
- Tech Painting Company, Inc.
- Technical Inspection, Inc.
- The C&S Group, Inc.
- The M Group Architects
- ThyssenKrupp Elevator Corporation
- Total Quality Building Services
- Tray, Inc.
- Triple ‘S’ Services, Inc.
- ULTRA Company
- United Building Services
- United Lighting & Supply, Inc.
- U.S. Lighting
- Valcourt Building Services
- W.L. Gary Company
- Washington Workplace
- Waste Management
- WB Waste Solutions
- Webb Property Services, LLC
- Webb Signs, Inc.
- Welch & Rushe, Inc.
- Whelan Security
- Wiss, Janney, Elstner Associates, Inc.