US Federal Government

Executive Office of the President
NASA - 1 
NASA - 2
US Department of Defense - Army - 1 
US Department of Energy
US Department of Homeland Security - 1 
US Department of Homeland Security - 2 
US Department of Transportation - FAA
US Department of Veterans Affairs (VA)
US Dept. of Homeland Security - Coast Guard
US Environmental Protection Agency - 1
US Environmental Protection Agency - 2
US General Services Administration (GSA)
US Department of Defense - Army - 2 

Other National Government

Government of Canada
New Zealand Ministry for the Environment

Private Sector

Premier Purchasing Partners, LLC
HDR, Inc.
Kaiser Permanente
McKesson, Inc.

State Governments

New York State (Office of General Services)
Commonwealth of Massachusetts
Province of Nova Scotia

Municipal Governments

City of San Francisco
City of Seattle
Los Angeles County, CA
City of San Jose, California
King County, Washington