- Meristar Hotels and Resorts, Inc.
- Mess. Service, Inc.
- Messier Services
- MHP Communications LLC
- Microtel Inn, Newport News
- Mid-Atlantic Renal Coalition
- Mike's American Grill, Springfield, VA
- Military Officers Association
- Military Operations Research Society
- Millennium Hotels and Resorts
- Mirror Enterprise, Inc.
- Moore North America
- Morgan Stanley
- MORS
- Mount Vernon Lee Enterprises, Inc.
- Mountain View Regional Hospital
- NARFE
- NATCO, The Organization for Transplant Professiona
- National Aerospace FOD Prevention
- National Air Transportation Association
- National Association of Chain Drug Stores
- National Association of Chemical Distributors
- National Association of Federal Credit Unions
- National Association of Industrial and Office Properties
- National Association of Landscape Professionals
- National Association of Truck Stop Operators, Inc.
- National Association of Women Business Owners NAWBO)
- National Business Education Association
- National Business Travel Association
- National Confectioners Association
- National Conference Center
- National Council of Teachers of Mathematics
- National Court Reporters Association
- National Datacare Corporation
- National Defense Industrial Association
- National Defense Transportation Association
- National Electric Manufacturers Association
- National Electrical Manufacturers Association
- National Kidney Foundation of the Virginias
- National Military Family Association
- National Newspaper Association
- National Pest Management Association
- National Republican Legislators Association
- National Sheriffs' Association
- National Society of Black Engineers
- National Stone Sand and Gravel Association
- National Training Systems Association
- National Utility Contractors Association
- Natural Bridge Historic Hotel and Conference Center
- Naval Medical Center Portsmouth