Pat Shanahan, senior vice president of Airplane Programs for Boeing Commercial Airplanes, greets guests at a re-opening ceremony for Boeing's newly expanded 737 delivery center, Monday, Oct. 19, 2015, at Boeing Field in Seattle. Ted S. Warren AP
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Thursday’s nominations are a step toward filling empty offices at the Pentagon two months into Trump’s administration. It has been a slow process, with Vincent Viola and Philip Bilden, his nominees to head the Army and Navy, both withdrawing after citing ethics concerns. The Pentagon currently has only one service secretary nominee. Trump’s pick for Air Force secretary, former New Mexico representative Heather Wilson, has yet to be scheduled for a Senate confirmation hearing.

Previously, Shanahan was a senior vice president at Boeing Commercial airplanes, where he managed the 737, 747, 767, 777 and 787 programs. He was responsible for operations at Boeing’s main manufacturing sites in Renton and Everett, Washington, and Charleston, S.C.

Before that he worked on the company’s missile defense systems programs, where he oversaw all U.S. Army aviation including helicopter units such as the CH-47 Chinook, the Bell-Boeing V-22 Osprey tiltrotor and the AH-64D Apache attack helicopter.

A Seattle native, Shanahan studied mechanical engineering at the University of Washington, where he now serves as a regent.

Mattis originally expressed interest in having Michelle Flournoy, former undersecretary for policy under Obama, as his deputy. She declined for moral reasons, telling Politico in an interview that “he needed a deputy who wouldn’t be struggling every other day about whether they could be part of some of the policies that were likely to take shape.”

Vera Bergengruen: 202-383-6036, @verambergen