https://en.wikipedia.org/wiki/James_McNerney
On June 30, 2005, Boeing hired McNerney as the chairman, President, and CEO. McNerney oversaw the strategic direction of the Chicago-based aerospace company with a focus on spending controls.[10]
As Boeing's first CEO without a background in aviation, he made the decision to upgrade the 737 series to 737 MAX instead of developing a new model.[5][11]