Marc has a diverse background in mountaineering. His experience began by hiking the Appalachian Trail in 1975 and soon after he turned to technical climbing. In 1977, Marc completed a number of big walls in Yosemite including an ascent of El Cap. He then began guiding in his native state of NH and became the director of a local climbing school. Marc started guiding high altitude climbs in 1986 including numerous trips to Mount McKinley, Aconcagua, the Himalayas, Ecuador and Peru. Seeing the need for professional standards in mountain guiding, Marc became involved with the American Mountain Guides Association, helping to develop its rock guides program as well as serving as an instructor and examiner. He is currently president of the United States Mountain Guides Association, a new association that seeks to promote professional guides and guiding. After twenty years of guiding, numerous courses and exams, Marc is the first internationally certified guide east of the Rockies and is a member of the UIAGM, the highest level of recognition in guiding. Marc is a Wilderness Emergency Medical Technician, Technician Class Radio Operator and has completed the Level III Avalanche Course.