"There will be no on-the-job training", he said.
The White House says President Donald Trump will nominate Kirstjen Nielsen to serve as his next secretary of Homeland Security. Nielsen, 45, now serves as deputy to Chief of Staff John Kelly, whom she worked under when he headed the DHS prior to taking the position at the White House. Kirstjen Nielsen was a top White House aide until now and formerly worked at the department. She previously worked as a special assistant to George W. Bush and for the Transportation Security Administration.
Ms. Nielsen was General Kelly's number two at DHS and later the White House.
The Senate will need to confirm Nielsen's nomination.
If confirmed, Nielsen would replace Acting DHS Secretary Elaine Duke, who was widely criticized for characterizing the federal government's response to Hurricane Maria in Puerto Rico as "a good news story".
"I think her credentials are being a little bit inflated", said the former official, who requested anonymity to speak candidly.
"She has won the universal respect of my entire cabinet and senior White House staff", said Trump.
Kirstjen Nielsen, Chief of Staff of U.S. Department of Homeland Security, center, walks to Air Force One as she departs Tuesday, Aug. 22, 2017, at Andrews Air Force Base, Md.
"I am pleased that the President has finally made a nomination for Secretary of Homeland Security after letting the critical national security position remain vacant as the nation faced multiple major hurricanes and a domestic terrorism attack".