Joseph Brady has been named vice president of Department of Defense Operations for the Aberdeen Proving Ground, Maryland, office of Hi-Tec Systems Incorporated.
Rear Adm. Mark J. Belton, USN, will be assigned as deputy commander, Naval Supply Systems Command, Mechanicsburg, Pennsylvania.
Rear Adm. William K. Davis, USN, will be assigned as vice chief of information, U.S. Navy, Washington, D.C.
Stephen W. Preston has been appointed to the Senior Executive Service as Department of Defense general counsel, Washington, D.C.
Knowledge Consulting Group, Reston, Virginia, has appointed Terry DiVittorio as vice president, cybersecurity strategy and solutions development.
Alion Science and Technology, McLean, Virginia, has promoted Rod Riddick to manager of the Engineering and Integration Solutions Sector.
Rear Adm. Russell E. Allen, USN, will be assigned as deputy commander, Seventh Fleet, Yokosuka, Japan.
Information International Associates Inc., Oak Ridge, Tennessee, has named Stephen C. Malone director of the Homeland Security and Information Analysis Center and Randy Hoffman as deputy director and scientific and technical information manager.
Col. Sam C. Barrett, USAF, has been selected for the grade of brigadier general and assigned as director, Central Command Deployment and Distribution Operations Center, U.S. Central Command, Southwest Asia.
Maj. Gen. Jeffrey G. Lofgren, USAF, has been assigned as deputy commander, U.S. Air Forces Central Command and deputy, Combined Force Air Component Commander, U.S. Central Command, Southwest Asia.
Marcel Lettre has been appointed to the Senior Executive Service as principal deputy undersecretary of defense for intelligence, Washington, D.C.
Sabre Systems Incorporated, Warrington, Pennsylvania has named Stuart Taylor senior director and national security and intelligence advisor.
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.