Top Secret  (51) SECRET  (50) TS/SCI  (14) Public Trust  (3)

King of Prussia  (54) State College  (28) Archbald  (18) Philadelphia  (17) Canonsburg  (14) Pittsburgh  (7) Tobyhanna  (6) Chesterbrook  (5) Chambersburg  (4) Johnstown  (4) Bristol  (3) Freeport  (3) Valley Forge  (2) Erie  (1) Harrisburg  (1) Mechanicsburg  (1) Ridley Park  (1) West Mifflin  (1)

Lockheed Martin  (65) Applied Research Laboratory at Penn State University  (30) General Dynamics Mission Systems  (13) Noblis  (10) Akima  (6) Carnegie Mellon University's Software Engineering Institute  (6) Arcfield  (5) Concurrent Technologies Corporation  (4) L3Harris Technologies  (4) KBR  (4) RTX  (3) Peraton  (3) Moseley Technical Services, Inc.  (2) U.S. Army Aviation and Missile Command  (2) LAUKOA  (2) SAIC  (1) Scientific Research Corporation  (1) Leidos  (1) SteerBridge  (1) Markon  (1) ENSCO  (1) Boeing Defense Systems  (1) GDIT  (1) M.C. Dean  (1) Nuclear Regulatory Commission  (1) Bastion Technologies, Inc.  (1) Sabre Systems, LLC  (1) ORBIS Inc. – An Engineering Solutions Company  (1) Right Talent Right Now  (1)