[1][2] Muilenburg was elected a member of the National Academy of Engineering in 2018 for leadership in defense, space, security, and commercial aircraft.

[10] In June 2015, Boeing announced that Muilenburg would succeed James McNerney as CEO, who was stepping down after ten years in that role.

[10] In 2018, Muilenburg agreed to a fixed-price contract to deliver two customized 747 planes to the U.S. government which left Boeing with billions in losses.

In October 2019, Boeing announced that the board had voted to separate the roles of chairman and CEO, both of which were held by Muilenburg.

[15][16] In November 2019, Muilenburg confirmed that he would not be taking a bonus for the year, after being criticized for the two plane crashes, which killed a total of 346 people.

[17] In December 2019, Boeing announced that Muilenburg resigned as the CEO and board director, in the aftermath of the two crashes of 737 MAX aircraft.

And yet, Dennis Muilenburg pressured regulators and put profits ahead of the safety of passengers, pilots, and flight attendants.

Boeing's press release stated that, "The Board of Directors decided that a change in leadership was necessary to restore confidence in the Company moving forward as it works to repair relationships with regulators, customers, and all other stakeholders.