Dr. Antonsen has worked in many roles in industry, academia, and government. At NASA he was the Element Scientist for Exploration Medical Capabilities in the NASA Human Research Program from 2015-2018 where he led the research element in developing systems medicine approaches to designing medical systems.

Following that he was the Assistant Director for Human System Risk Management in the Human Health and Performance Directorate at NASA Johnson Space Center from 2018-2021 where he was responsible for chairing the NASA Human System Risk Board and working with human spaceflight programs to prioritize research and operational investments that protect human health and performance in space.

From 2013 to the present he has been faculty at Baylor College of Medicine in Houston Texas where he currently holds appointments as Associate Professor of Space Medicine and Associate Professor of Emergency Medicine with tenure. He was a co-founder of ADE Aerospace Consulting and ADE Medical, two companies that provided engineering and medical support to the world record breaking Stratex mission in 2014.

His educational background includes BS, MS, and PhD degrees in aerospace engineering and he is currently a practicing emergency medicine physician in Houston Texas. He continues to do research developing advanced risk assessment and analysis capabilities. Current research interests include space medicine, risk network analysis, AI in medicine, and space health systems design.