Prof. Gunga started his career at the Department of Physiology at the Free University of Berlin, Germany in 1987 with experimental and clinical cardio-vascular studies in humans such as during bed rest, head-down tilt and extensive physical exercise. He performed studies on intravascular-interstitial fluid shifts, plasma volume and red blood cell mass control as well as renal physiology in humans under extreme environmental and physical conditions including research in Antarctica and space. The results have been published in high ranked scientific journals such as Journal of Applied Physiology, Lancet, and Proceedings of the National Academy of Sciences. Since 2001 Gunga focused his research fields on thermoregulation and heat balance in humans in extreme environments. He has been involved in several space missions (D-1, D-2, MIR, ISS) and is currently ESA Principal Investigator of the Circadian Rhythm experiment on the International Space Station which will last until 2018. His recent published books "Nathan Zuntz” and "Human Physiology in Extreme Environments” received the "Life Science Book Award” of the International Academy of Astronautics (IAA) in 2010 and 2015, respectively.Prof. Gunga is currently deputy director of the Department of Physiology of the Charite University Medicine Berlin, speaker of the Center of Space Medicine and Extreme Environments, and among others Member of Wissenschaftlicher Beirat für das Sanitäts- und Gesundheitswesen beim Bundesminister für Verteidigung (Wehrmedizinischer Beirat) (Medical Advisory Board of the Military Medical Service of the German Federal Ministry of Defense) and Chairman of the "Programausschuss des Deutschen Zentrums für Luft- und Raumfahrt (DLR)”.