Mehmet B. Sefer is an engineer specializing in mechatronics, test automation, motion control, and vacuum systems for space-adjacent applications. He leads the full lifecycle of custom systems -- requirements, design, controls, build, verification, and documented handoff -- with an emphasis on reliability and repeatability. His earlier work included managing a NASA-funded investigation of cold-welding and related joining phenomena in ultra-high vacuum environments to inform future in-space construction. He has also contributed to concepts of space-based solar power. Sefer serves as a NASA Lucy Asteroid Ambassador and Solar System Ambassador, engaging students and communities with current missions and discoveries.