Kinton, Massport chief, to retire

Kinton, Massport chief, to retire    Thomas J. Kinton Jr., chief executive officer and executive director of the Massachusetts Port Authority, said Wednesday he will retire, effective June 1.
   Massport is a 1,200-person agency with more than $500 million in annual revenue derived from owning and operating Boston Logan International Airport, two other airports, the public terminals in the Port of Boston, and hundreds of acres of real estate.
   Kinton joined Massport in 1976 filling a temporary job in the engineering department. He became aviation director for the port in 1993. He was appointed CEO of Massport in 2006.