Companies headquartered in Alexandria include the Institute for Defense Analyses, the Center for Naval Analyses, VSE and the Pentagon Federal Credit Union.

Alexandria is home to numerous trade associations, charities, and non-profit organizations including the national headquarters of groups such as the American Diabetes Association, BoatUS, Catholic Charities, Citizens for the Republic, Global Impact, Good360, Islamic Relief USA, United Way, Volunteers of America and the Salvation Army. Other organizations located in Alexandria include American Coalition for Clean Coal Electricity, the American Counseling Association, the Society for Human Resource Management, the National Society of Professional Engineers, and the National Beer Wholesalers Association.

Largest employersEdit

According to the City's 2012 Comprehensive Annual Financial Report,[47] the top public employers in the city are:

# Employer # of Employees
1 United States Department of Commerce 1,000+
2 United States Department of Defense 1,000+
3 City of Alexandria 2,398
4 Alexandria City Public Schools 2,181
5 Washington Metropolitan Area Transit Authority 500-999
6 Northern Virginia Community College 500-999
7 United States Department of Agriculture 500-999

The top private employers in the city are:

# Employer # of Employees
1 Inova Alexandria Hospital 1,000+
2 ABM Industries 1,000+
3 Institute for Defense Analyses 1,000+
4 Center for Naval Analyses 1,000+
5 Gali Service Industries 1,000+
6 Oblon, Spivak, McClelland, Maier & Neustadt 250-499
7 Grant Thornton LLP 250-499