- HSC Pediatric Center
- Hudson Institute
- Humane Society of the United States - Washington, DC
- Hyde Leadership Public Charter School
- ICMA
- Industrial Bank N.A.
- Information Resources Management College
- Information Sciences Corporation, Office of Early Childhood Development
- Ingleside Presbyterian Retirement Community
- Internal Revenue Service
- International Association of Convention and Visitors Bureau
- International Biometric Association
- International Dairy Foods Association
- International Life Sciences Institute
- Island Press
- ITS America
- Iwaniec Associates, Inc.
- Krisam Group
- LA Inc. The Convention and Visitors Bureau
- LabCorp
- Las Vegas Convention and Visitors Authority
- Latham Hotel Georgetown, Washington DC
- Law Office of Peter C. Wolk, Esq.
- LeadingAge
- Legg Mason Wood Walker, Incorporated of Maryland
- Little Sisters of the Poor
- Loews L'Enfant Plaza Hotel
- Lupus Foundation of America
- Lupus Foundation of America, Greater Washington Chapter
- Management Options Inc.
- Marrow Foundation
- MedStar Georgetown University Hospital
- MedStar Washington Hospital Center
- Meeting Management Services, Inc.
- Mental Retardation and Developmental Disabilities Administration
- Merchant Bank
- MetLife
- Microsoft
- Middle East Institute
- Military Sealift Command
- Miller and Shook Companies
- Mindshare
- Mortgage Bankers Association
- Multi-Media Holdings, Inc.
- Municipal Travel
- NAM Council of Manufacturing Associations
- NASA Peer Review Services
- Nation Council for Interior Design Qualification
- National Agricultural Statistics Service - USDA
- National Air Traffic Controllers Association