Tysons Corner, Virginia in the context of Tysons Galleria

Chantilly is a census-designated place (CDP) in western Fairfax County, Virginia, United States. The population was 24,301 as of the 2020 census.Located in the Northern Virginia portion of the Washington metropolitan area, Chantilly sits approximately 25 miles (40 km) west of Washington, D.C., via Interstate 66 and U.S. Route 50. It is located between Centreville to the south, Herndon and Reston to the north and northeast, respectively, and Fairfax 7 miles (11 km) to the southeast. U.S. Route 50 and Virginia State Route 28 intersect in Chantilly, and these highways provide access to the Dulles/Reston/Tysons Corner technology corridor and other major employment centers in Northern Virginia and Washington, D.C.

Booz Allen Hamilton Holding Corporation (informally Booz Allen) is the parent of Booz Allen Hamilton Inc., an American company specializing in digital transformation and artificial intelligence. The company is headquartered in McLean, Virginia, in the Washington metropolitan area, with 80 additional offices around the globe. Booz Allen's stated core business is to provide consulting, analysis, and engineering services to public- and private-sector organizations and nonprofits.

It is a major provider of cybersecurity services to the U.S. Security and Exchange Commission. Nearly all of the company's revenue comes from U.S. government contracts.