Jean-Claude Mosca is a French mountaineer renowned for his numerous ascents and his commitment to the mountain world. Born in Nice, he discovered his passion for mountaineering at an early age in the Alpes-Maritimes, the region where he grew up. He quickly distinguished himself with his audacity and taste for adventure, distinguishing himself in challenging climbs and opening new routes, particularly in the Mercantour massif. Throughout the 1970s and 1980s, Jean-Claude Mosca became a key figure in mountaineering on the Côte d'Azur. He participated in numerous expeditions, both in the Alps and in other prestigious massifs, particularly in the Himalayas, and was also involved in training young climbers. His commitment to transmitting the values ​​of the mountains led him to become a mountain guide, a profession he pursues with passion, sharing his experience and knowledge of the terrain with his clients and peers. Alongside his career as a mountaineer and guide, Jean-Claude Mosca contributes to the promotion of mountain heritage through publications and conferences. He is the author of several books and guidebooks that are a reference for climbing and hiking enthusiasts in the south-east of France. A distinguished instructor at the EMHM in Chamonix, he has trained generations of military personnel and guides in mountaineering, skiing, and mountain survival techniques. In 1971, Jean-Claude Mosca was a member of the French FFM expedition to Makalu led by Robert Paragot, where he played a key role in the opening of the west pillar, a historic and technical ascent that remains a benchmark in French mountaineering. In 1979, he was part of the French national expedition to K2 led by Bernard Mellet. In 1981, he participated in an attempt on Everest with the French military expedition led by Pierre Astorg, but the team had to abandon the attempt due to the extreme conditions. Jean-Claude Mosca, then retired from the Chamonix High Mountain Military School, died in April 2004 in an accident during a ski descent in the Mont Blanc massif. Known for his teaching skills, his commitment, and his passion for the mountains, he received numerous expressions of respect and sadness from the mountain community, his former students, colleagues, and friends.