Frank Zegler

Digital Research Alliance of Canada, Lockheed Martin (United States)

Papers

Total Citations

H-Index

About

Frank Zegler is a space systems engineer whose work has made significant contributions to in-space propulsion architecture and cryogenic technology development. His research focuses primarily on propellant depot systems, cryogenic spaceflight infrastructure, and advanced launch vehicle applications — areas critical to enabling sustainable and cost-effective space exploration beyond low Earth orbit. Zegler's most influential work, "Evolving to a Depot-Based Space Transportation Architecture" (2010, 37 citations), helped reshape thinking around lunar exploration logistics by demonstrating the substantial performance and reliability advantages of orbital propellant depots. This contribution positioned depot-based architectures as a compelling alternative to traditional monolithic mission designs. His 2012 paper on integrated vehicle propulsion and power systems for long-duration cryogenic spaceflight (13 citations) advanced the technical case for multifunctional cryogenic stages capable of supporting crewed and robotic deep-space missions lasting days to months. Earlier work examining Centaur's application to lunar lander concepts underscored his commitment to leveraging proven, high-performance upper stage technology for next-generation exploration. Affiliated with United Launch Alliance (ULA), Zegler has consistently bridged theoretical system analysis with practical engineering solutions, making him a notable voice in the ongoing conversation about affordable, reliable human spaceflight infrastructure.