Melissa A. St. Hilaire, PhD, is a sleep and circadian researcher with over two decades of experience studying how physiological systems adapt to sleep deprivation and circadian disruption in extreme environments. She has led and contributed to numerous interdisciplinary projects aimed at improving crew health and resilience in isolated, confined, and extreme (ICE) environments, including crewmembers aboard the ISS and in NASA’s HERA analog. Her work focuses on developing and evaluating non-pharmacological countermeasures to mitigate health and performance risks. With expertise in human physiology, behavioral interventions, and translational research, she brings a critical perspective to assessing technologies that support crew health in space.