Intelsat is in Tysons Corner, Va too.
Large satellite transmission relay provider.
https:// www.nbcwashington.com/news/local/Intelsat-Moving-US-Headquarters-to-Tysons-Corner-181905921.html
Also Omnis Inc is in McLean, Va
Omnis, Inc. is a global consulting firm[1] with a concentration in the physical sciences, engineering, aerospace, defense, intelligence and finance.[2] The company works with those in government, academia and private industry. Charles A. Duelfer is a special advisor to the chief executive officer, Dr. Joseph E. Pesce, Ph.D
https:// en.m.wikipedia.org/wiki/Omnis,_Inc.
Cofounder died in a boating accident.
https:// www.washingtonpost.com/local/obituaries/2011/08/09/gIQAO11Y5I_story.html?utm_term=.ac7eaac8551b