Just four weeks after planting its flag in Colorado with a flurry of hires and an aggressive plan to expand operations, Democrat Mike Bloomberg’s campaign has a new state director, Colorado Politics has learned.

Jeannette Galanis, the former director of public affairs for Denver Public Schools, is being replaced at the helm of Bloomberg’s Colorado operation by Ray Rivera, a veteran strategist who was state director and western states caucus director for Barack Obama’s 2008 campaign.

Rivera has been working as a senior advisor to Bloomberg’s Colorado campaign. He’ll keep that title and start wearing the state director hat immediately, a campaign spokeswoman said Tuesday.

“Mike Bloomberg 2020’s Colorado campaign presence has grown to include 40-plus staffers and multiple field offices – and Jeannette Galanis was integral to making that happen,” said Betsy Hart, the campaign’s Colorado press secretary, in a statement. “She has left the campaign to pursue other opportunities, and we know she will drive similar success in her future endeavors.”

The campaign didn’t say where Galanis was headed, and she didn’t respond to a message from Colorado Politics.

The former New York mayor’s campaign has been ramping up quickly ahead of Colorado’s March 3 presidential primary, which falls on Super Tuesday this year. Mail ballots start going out to state voters in two weeks.

The Bloomberg campaign has opened field offices up and down the Front Range and hired 30 field staffers in the two weeks since throwing a launch event in Littleton, Hart said.

The field offices open so far are in South Denver, Lower Downtown Denver, Aurora, Jefferson County, Boulder, Fort Collins, Colorado Springs and Pueblo, the campaign said. Paid canvassers are operating out of the Boulder and Fort Collins offices.

The campaign announced a round of endorsements last week from high-profile Democrats and unaffiliated state residents, including ProgressNow founder Michael Huttner, 2008 Democratic National Convention co-chair Juanita Chacon, former Colorado Democratic Party treasurer Judith Zee Steinberg, former Denver human services manager Donna Good and hotelier Walter Isenberg.