It’s only been 10 months but there are changes on the horizon for Gov. Dannel P. Malloy’s administration.

Chief of Staff Tim Bannon will be leaving at the end of the year.

“I want to thank Tim for his extraordinary gifts that he has leant us. We would not have had the level of success we’ve had without his steady and calm demeanor,” Malloy said Tuesday morning during a press conference outside his office.

Malloy, whose known for working people hard, said Bannon’s departure doesn’t signal any unrest within the administration or change in strategy.

“My private discussions with Tim have always been that this was a durational assignment,” Malloy said. “He was making a personal commitment to me to get the administration started and to take on a tremendously difficult session which we had to face.

Bannon said he plans to head back to the private sector, but didn’t believe it was appropriate while he was still chief of staff to start looking for work elsewhere before Tuesday’s announcement.

A Manchester resident, Bannon, who was college roommates with Doonesbury creator Garry Trudeau came to the administration from the Connecticut Housing Finance Authority and has had a long career in the public sector, including working for Connecticut’s last Democratic Gov. William O’Neill. Bannon met Malloy when he worked for Purdue Pharma in Stamford during Malloy’s term as mayor.

“The idea and the commitment was to do everything I could to launch this administration,” Bannon said.

Asked if Malloy simply wore him out, Bannon said he doesn’t know where that reputation came from.

“We never work more than seven days a week and on not one of those days did I work more than 24 hours,” Bannon joked. “This hard work stuff is a figment of popular imagination.”

Aside from Bannon, Malloy’s spokeswoman Colleen Flanagan will be moving over to do public relations for the newly formed Board of Regents, and Alvin Wilson, director of operations who served as Bannon’s deputy, will move over to the Commission on Human Rights and Opportunities.

“Colleen will be very difficult to replace. She’s talented, smart and tough and to be all those things at 29 is amazing,” Roy Occhiogrosso, Malloy’s senior communications adviser, said.

Flanagan will be replaced by Andrew Doba, who was a deputy press secretary on Diane Farrell’s 2006 race.