John Sweetser is a Mission Architect and accomplished aerospace engineer with a career spanning national security, space systems, and advanced engineering leadership.

Sweetser began his career at Sandia National Laboratories, where he worked on modeling and simulation for national security applications. He later joined Lockheed Martin, focusing on space vehicle design, before moving to Sierra Space, where he rose to the role of Chief Engineer. Known for his systems-thinking approach and ability to lead complex technical teams, he continues to help shape innovative aerospace missions while remaining active in education, sustainability initiatives, and volunteer fire service.