A seasoned aerospace professional with 29 years of experience at NASA, Stephen specialized in payloads, space stations, satellites, and rocket launches. He has directly contributed to the launch of over 180 rockets, holding pivotal roles such as Operations Director, where he provided the critical Go/No-Go system calls. Post-retirement, He is passionate about delivering engaging enrichment talks on science, space, and NASA-related topics, having successfully presented on various cruise lines, including MSC Magnifica, NCL Star, and Sun Princess.  His interactive and informative sessions have been well received, showcasing his enthusiasm for inspiring public interest in science and space exploration.