Sean Willis is an Engineer at Scaled Composites, LLC, with a BS in Aeronautical and Astronautical Engineering from the University of Illinois. He has worked on the design, build, and/or test of the Stratolaunch, Proteus, and Model 401 aircraft among others, and has had the opportunity to photograph them all from the air. Occasionally he serves as a Flight Test Engineer in Proteus, once reaching FL540. Prior careers had him selling cars, fixing computers, writing technical documents, designing motors for satellites, and wrenching on bicycles, amongst others. He is a private pilot, an avid reader, a husband, and a father.