Margaret “Hap” Brennecke was the first female welding engineer employed at NASA’s Marshall Space Flight Center. Born in 1911, Brennecke earned a chemistry degree from Ohio State University and did graduate work in metallurgy at the Carnegie Institute of Technology in Pennsylvania, the University of Pittsburgh, and the University of California in Los Angeles. She worked for 22 years as a research metallurgist for the Aluminum Company of America (ALCOA), identifying materials for military vehicles and engineering projects used in World War II. In 1961, at the beginning of the Apollo program, Brennecke joined NASA’s Marshall Space Flight Center as a welding expert. Her experience was crucial to determining which materials and techniques should be used for building space rockets, especially cryogenic fuel tanks. Having experienced gender discrimination throughout her career, Brennecke chose to use the nickname ‘Hap’ to disguise her gender in written reports. As one of the earliest women engineers at NASA, Brennecke opened doors for future generations of women in aerospace and materials science.
