"Kevin McAleenan has done an outstanding job as Acting Secretary of Homeland Security," Trump tweeted, adding that McAleenan has decided to transition to the private sector.
Trump also noted that he will be announcing the new acting secretary next week, and that there are "many wonderful candidates."
In April, then-US Homeland Security Secretary Kirstjen Nielsen announced that she would be stepping down and that McAleenan would become the acting chief of the Department of Homeland Security (DHS). Before being appointed as the acting DHS chief, he served as the commissioner of US Customs and Border Protection after being confirmed by the US Senate in 2018.