- Albright Events, Inc.
 - Alexandria - Event planning and management services including hotel or site selection, catering, entertainment, logistics, transportation, and accommodations. - Event Concepts, Inc.
- Offering special event promotions and event management services.
- Global Events Partners
- Specializing in corporate meetings, special events, and incentive programs for industry professionals.
- Greenworks, Inc.
- Floral and event management company.
- Guest Services, Inc
- Fairfax - Public benefit corporation providing management services a variety of operations.
- International Conference Management
- Bethesda - Online software for event management delivering registration, customer data authentication, credit card authorization, and more.
- Jan Davis Entertainment
- Alexandria - Provides turn-key event production for events ranging from international conventions to wedding receptions.
- Meeting Solutions
- Offers meeting and conference planning services, including hotel and convention site selection and contract negotiation.
- Metropolitan Shuttle
- Rockville - Provides group transportation in most major metropolitan areas nationwide.
- Ward and Ames
- National full-service event planning company has offices in Houston and Washington, D.C.
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