Best fortune 500 companies in Alexandria, VA

Lockheed Martin Corporation is a global security company engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems and products. It also provides a range of management, engineering, technical, scientific, logistic, and information services. The Company operates in four business segments: Aeronautics, Electronic Systems, Information Systems & Global Services, and Space Systems. Lockheed Martin was formed in 1995 from the merger of Lockheed Corporation and Martin Marietta. In September 2008, Lockheed Martin Corporation acquired Aculight Corporation. In January 2009, it completed its acquisition of Universal Systems & Technology, Inc. (UNITECH). In August 2009, it completed its acquisition of Gyrocam Systems LLC (Gyrocam). Gyrocam develops and supplies gyrostabilized optical surveillance systems and sustainment field services, principally to the United States military. Lockheed Martin Missiles and Fire Control, a unit of the Company's Electronic Systems business area, would manage the Gyrocam business.

Leidos is an American defense company headquartered in Reston, Virginia that provides scientific, engineering, systems integration, and technical services. Known throughout the industry for maintaining the highest standards of integrity and ethical behavior, Leidos works extensively with the United States Department of Defense, the United States Department of Homeland Security, and the United States Intelligence Community, including the NSA, as well as other US government civil agencies and selected commercial markets.

Founded in 2004, Anthem Inc. has been the largest for-profit managed health care company in the Blue Cross and Blue Shield Association. Headquartered in Indianapolis, Indiana, Anthem, Inc. delivers a number of leading health benefit solutions through a broad portfolio of integrated health care plans and related services. This American health insurance company also offers specialty products such as life and disability insurance benefits, dental, vision, behavioral health benefit services, and more.

AECOM is a global provider of professional technical and management support services to a broad range of markets, including transportation, facilities, environmental, energy, water and government. With approximately 45,000 employees around the world, AECOM is a leader in all of the key markets that it serves. AECOM provides a blend of global reach, local knowledge, innovation and technical excellence in delivering solutions that create, enhance and sustain the world's built, natural, and social environments. A Fortune 500 company, AECOM serves clients in more than 150 countries and had revenue of $8.0 billion during the 12 months ended March 31, 2014.

Robert Half is a professional services company and is the world's first and largest accounting and finance staffing firm. The company was founded by Robert Half in 1948 by providing professional staffing services. Robert Half is also now involved in risk consulting and internal audit services in addition to its human resources consultancy business. The company reported revenues of US$4.2 billion for the fiscal year 2013.

Universal Health Services, Inc. (UHS) is one of the nation's largest and most respected healthcare management companies, operating through its subsidiaries acute care hospitals, behavioral health facilities and ambulatory centers nationwide, in Puerto Rico and the U.S. Virgin Islands. Founded in 1978 by Alan B. Miller, Chairman and CEO, UHS subsidiaries employ more than 60,000 individuals. UHS maintains one of the strongest balance sheets in the industry and is rated investment grade by Moody's, Standard & Poor's and Fitch. This strong capital position has enabled the company to develop and acquire many new facilities over the past few years.