56-year-old Shanahan has served as deputy defense minister.Mattis left the minister of defence tasks, two months earlier than planned. CNN

the U.s. defense secretary is 1.1.2019 from Patrick Shanahan .

He replaced Jim Mattis, who told the week he was leaving his duties ”because of disagreement”.

Mattis justify the decision in an open letter.

president Donald Trump announced the nomination on Twitter.

– I have the pleasure and honor to introduce a very talented deputy minister of defence of Patrick Shanahan, who rose to be secretary of defense at the year end. His resume is convincing, and he has previously worked, inter alia, Boeing. He is a good choice for the task.

Patrick Shanahan followed military exercises of the Lewis-Mcchord base in Washington in 2017. ZUMAwire/MVphotos