Steve Mills is returning to the New York Knicks as president and general manager, replacing Glen Grunwald in a front-office shake-up just days before the start of training camp.

Mills spent a decade as an executive at Madison Square Garden and before that worked at the NBA for 16 years. He left MSG in 2009 after the arrival of Donnie Walsh as Knicks president.

Grunwald took over when Walsh left in 2011 and constructed much of the roster that helped the Knicks win a playoff series last season for the first time since 2000. He will remain with the organization as an adviser, the Knicks said in a release Thursday.

Madison Square Garden Chairman James Dolan called Mills ”a well-respected sports executive with a strong background in basketball, as well as a familiarity with NBA operations and our company.”

”We look forward to his leadership and believe he is the right person to help us reach our ultimate goal of winning an NBA championship,” Dolan said.

Reported by Brian Mahoney of the Associated Press