(CNN) Hillary Clinton's campaign is taking the reins of the Democratic National Committee, installing a new top official on Thursday to oversee the party's day-to-day operations through the general election.

Brandon Davis, national political director for the Service Employees International Union, will become the general election chief of staff for the Democratic Party. His selection formalizes the coordination of the Clinton campaign and the committee, a stark contrast to Donald Trump who is currently at odds with his party

Robby Mook, the Clinton campaign manager, arrived Thursday morning at Democratic headquarters on Capitol Hill to introduce Davis to the party's staff.

"We have a lot of work to do over the next five months to make sure that Donald Trump does not become president," Mook said as he introduced Davis, according to a person in the room. "With so much at stake in this election, we could not ask for a better partner in that mission than the team here."

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