Gerasimos is a Lecturer in Training and Physical Conditioning at the Hellenic Naval Academy and an Exercise Physiologist specializing in endurance performance and applied training science. He has taught across military and higher-education institutions and has an active research portfolio spanning endurance physiology, strength training, thermoregulation, wearable technology, and AI-assisted performance analysis. He has published extensively, presented internationally, and serves as a reviewer and editorial board member for leading journals.