Marillyn Adams Hewson (born December 27, 1953)[1] is an American businesswoman who served as the chairman, president and chief executive officer (CEO) of Lockheed Martin from January 2013 to June 2020.

[5] Hewson joined the Lockheed Corporation in 1983 after 4 years as an economist at the Bureau of Labor Statistics.

[13] On March 16, 2020, Lockheed announced that Hewson would become the executive chair of the board and be replaced as CEO on June 15.

[22] Hewson was named "CEO of the Year" for 2018 by Chief Executive magazine, and was a member of the selection committee for 2019.

[25] In 2019, Hewson received the Golden Plate Award of the American Academy of Achievement presented by General Joseph Ralston, USAF, former Supreme Allied Commander Europe.

[26][27] Hewson was honored with the Aviation Week & Space Technology 2021 Philip J. Klass Award for Lifetime Achievement.