Sam Shusterman, who had signed on as Suffolk District Attorney Dan Conley’s mayoral campaign manager, is leaving the post. Sources unaffiliated with the Conley campaign tell the Reporter that they expect her to take a job with the state Department of Conservation and Recreation.

Shusterman, a highly regarded operative, has previously worked in Gov. Deval Patrick’s administration and served on his campaign. She is a Somerville resident who studied at Boston College Law School.

Mark Warren, who has worked with the Democratic Congressional Campaign Committee, will be taking over as campaign manager. He has managed campaigns for campaigns of New Jersey Congressman John Adler, Oregon Congressman David Wu, and Mayor Bernie Platt of Cherry Hill, New Jersey.

“We're sorry to see Samantha go,” Conley said in a statement. “She's steered this campaign from the beginning to the strong position we're in right now: airing the first television ads of the race, rolling out a brand-new website, and calling or canvassing thousands of Boston voters each week. On a personal level, I wish her the best and trust she'll bring her unique talents to whatever she next puts her mind to.”

In her own statement, Shusterman called the move a "tough decision." "But the campaign is in a strong position and Mark will be able to take it even further," she said. "I'm looking forward to my new career opportunity, but I'm also planning to celebrate with the campaign when Dan is elected."