Alan F. Estevez has been assigned as principal deputy undersecretary of defense (acquisition, technology and logistics), Washington, D.C.
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.
John S. Albanese has been appointed to the Senior Executive Service as general counsel, Washington Headquarters Services and Pentagon Force Protection Agency, Washington, D.C.
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.