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Marc Birkigt (8 March 1878, Geneva – 15 March 1953, Versoix) was a Swiss engineer who moved to Barcelona, Spain when he was hired as an engineer by Emilio de la Cuadra, founder of Hispano-Suiza automobiles. He created the Dewoitine company along with Émile Dewoitine. Birkigt was nominated for the Car Engineer of the Century prize for the luxurious Hispano-Suiza H6 car in the 1920s. He also won fame for the aircraft engines and guns he designed at Hispano-Suiza as chief engineer, including the liquid-cooled V8 engine that powered the famous French SPAD VII and SPAD XIII World War I fighters, and the British Sopwith Dolphin and S.E. 5a, the latter of which was considered to be the most effective military aircraft of WW I.