John M. Gilligan has been named president and chief operating officer of Schafer Corporation, Arlington, Virginia.
Maj. Gen. Charles Q. Brown Jr., USAF, has been assigned as director, operations, strategic deterrence and nuclear integration, Headquarters U.S. Air Forces in Europe, Ramstein Air Base, Germany.
Luke J. McCormack has been appointed as chief information officer for the Department of Homeland Security, Washington, D.C.
Richard Minter has joined Signalhorn, Backnang, Germany, as chief operating officer.
Data Solutions & Technology Incorporated, Lanham, Maryland, has appointed Alvie Johnson as vice president, strategic business development.
Praxis Engineering, Annapolis Junction, Maryland, has named William “Chuck” Hoppe as the new program manager for Aberdeen Proving Ground.
Rear Adm. John N. Christenson, USN, will be assigned as chief of staff, U.S. European Command, Stuttgart, Germany.
Sabre Systems Incorporated, Warrington, Pennsylvania, has named Christopher Le vice president of solutions and sales.
Jim Glowacki has joined Suss Consulting, Jenkintown, Pennsylvania, as executive consultant.
Vice Adm. Joe Kernan, USN, (Ret.), has joined SAP National Security Services, Rockville, Maryland, as vice president of business development.