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In page Elsie MacGill:

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Following graduation, MacGill took a junior job with a firm in Pontiac, Michigan. During the time there, the company began producing aircraft, which furthered Elsie's interest in aeronautics. She began part-time graduate studies in aeronautical engineering at the University of Michigan, enrolling in the fall of 1927 in the full-time Master of Science in Engineering program to begin aircraft design work and conduct research and development in the University's new aeronautics facilities.[4] In 1929, she became the first woman in North America, and likely the world, to be awarded a master's degree in aeronautical engineering.[6]