Space Radiation
The Space Radiation Element (SRE) of NASA’s Human Research Program (HRP) seeks to characterize human health outcomes associated with space radiation exposure, helping the space agency build strategies that protect astronaut health and ensure safe human spaceflight.
Meet the SRE Team
Element leaders integrate and coordinate science, as well as handle project costs, schedules, technical work, and resources. Across HRP, all leadership teams work hand-in-hand to ensure that research proposed by the other HRP elements is implemented using the best method possible while maintaining the health of crew members.
Meet the leadership team for HRP’s SRE. To contact them, email the group at jsc-hrp-space-radiation-element at mail.nasa.gov.
SRE Leadership
Jason Weeks, Element Manager
Jason Weeks has more than 20 years of experience at NASA, including as a budget analyst for NASA’s chief financial officer.
Janice Zawaski, Element Scientist
Janice Zawaski has 15 years of radiation research experience. During graduate school, she studied the combined effects of radiotherapy and brain tumor presence on surrounding tissue.
Ryan Norman, Deputy Element Manager
Ryan Norman first joined NASA at Langley Research Center in 2013 as a research physicist investigating the physics of space radiation to understand how it affects human health
Brock Sishc, Cancer Discipline Lead
Brock Sishc’s scientific background is in radiation biology, translational radiation oncology, the response of biological systems to charged particle exposure, charged particle radiotherapy, and radiation carcinogenesis.
Janapriya “JP” Saha, Degenerative Disease Discipline Lead
Janapriya “JP” Saha's research focuses on ionizing radiation-induced DNA damage signaling, repair, and carcinogenesis, with a strong emphasis on the characterization of space radiation-induced biological effects and charged particle radiotherapy.
Gregory Nelson, Central Nervous System Discipline Lead
Greg Nelson joined SRE on a part-time basis in his current role in 2014. His laboratory investigates dose rate effects on central nervous system responses to charged particles.
