President Donald Trump has chosen Sean Curran, the agent in charge of his security detail during the 2024 campaign, to be the new director of the US Secret Service, an organization under intense scrutiny following two failed assassination attempts against the then-Republican candidate.

Curran was one of several agents who piled on top of Trump last July after a gunman opened fire on the then presumptive Republican nominee during a campaign rally in Butler, Pa.

Mr. Curran, a current agent, will take the helm of an agency that has been the focus of several investigations since the July assassination attempt against President Trump.