ManTech, Herndon, Virginia, has appointed John J. Boyle as senior vice president, chief growth officer for the company's Mission Solutions and Services Group.
Rod Allison has joined CLEAR, New York, as vice president of operational security.
Col. Brian C. North, USA, has been assigned as brigade commander, 11th Theater Tactical Signal Brigade, Fort Hood, Texas.
Vice Adm. Michael M. Gilday, USN, has been appointed to the grade of admiral and assigned as chief of naval operations, Washington, D.C.
Mark T. Esper has been sworn in to serve as secretary of defense.
Intelsat, S.A., McLean, Virginia, has appointed David M. Tolley as executive vice president and chief financial officer.
By Light Professional IT Services LLC, Arlington, Virginia, has named John Wilcox as vice president of strategic initiatives.
Stella Medlicott has been appointed senior vice president and head of group function marketing and corporate relations at Ericsson, Stockholm.
Centauri, Chantilly, Virginia, has appointed Dennis Kelly Jr. as chief operating officer and president.
Nadia Carlsten has joined Amazon as head of strategy and operations.
LoanCare, Virginia Beach, Virginia, has appointed Michael Blair as chief administrative officer.
Brig. Gen. Jeffrey H. Hurlbert, USAF, has been assigned as deputy inspector general of the Air Force, Office of the Secretary of the Air Force, Pentagon, Washington, D.C.
Command Sgt. Maj. Michael A. Grinston, USA, has been assigned as the 16th sergeant major of the Army (SMA).