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Mr. Sirangelo is currently a Scholar in Residence in Aerospace Engineering at CU Boulder.Ìý He was the founding executive andÌýformer Head of Sierra Nevada Space Systems, as well as theÌýFounding member and past Chairman of the Commercial Spaceflight Federation. He was recently elected a fellow of the American InstituteÌýof Aeronautics and Astronautics (AIAA) in recognition of his notable and valuable contributions to arts, sciences or technology of aeronautics and astronautics. He led program teams thatÌýparticipated in over 300 space missions, including more than 20 planetary and 70 NASA missions.Ìý