Associations

Aircraft Owners and Pilots Association
Association of Public-Safety Communications
   Officials, Inc.
American Society for Cell Biology
American Society for Microbiology
National Electrical Contractors Association,
   Washington, DC Chapter
National Mining Association
National Recreation and Park Association
National Venture Capital Association
Society of Fire Protection Engineers
Washington Building Congress

Building Industries

Centennial Contractors Enterprises, Inc.
The Clark Construction Group, Inc.
Donohoe Real Estate Services
The Electrical Alliance
International Brotherhood of Electrical Workers,
   Local 26
James G. Davis Construction Corporation
Joint Apprenticeship & Training Committee
   (Washington, DC)
Hensel Phelps Construction Co.
Potomac Valley Brick and Supply Co.
Seawright Homes, LLC
VarcoMac Electrical Construction Co.

Hospitality

Doubletree Bethesda Hotel
  and Executive Conference Center

Tradeshows and Conventions

Aircraft Owners and Pilots Association
American Chemical Society
APCO International - Annual Conference,
   Technology Roundtables, Women in Public Safety
   Leadership Conference, Leadership in Policy
   Awards Dinner
APCO Global Alliance - APCO Global Congress
CITEM (Center for International Trade Expositions
   and Missions—Philippines)
Digestive Disease Week
ISM—Exhibition and Convention Executive Forum
National Mining Association - MINExpo
National Venture Capital Association Annual Meeting
Naylor/CMG—AMI Expo, Worldwide Food Expo,
   InterBev, USA Pavilion at Americas Food &
   Beverage Show, Southern Building Show,
   U.S. Food Showcase and UMA Motorcoach Expo
PCIA-The Wireless Infrastructure Show

Corporate and Industrial

Affinity Center International
Best Software, Inc./SAGE
Comcast SportsNet
Discovery Education
ExpoExchange
Freddie Mac Foundation
George Washington University
Microsoft Corporation
National Institute on Aging (NIH)
Parking Management Inc.