Dennis has worked as a professional mountain guide since 1997. He has nearly 30 years of climbing experience. His passion for mountains and exploration has led him to climb and travel all over the world. In 1993 he worked as a volunteer in Nepal where he discovered his love of foreign cultures while helping the Nepalese people. He has worked for many well-respected guide services, including while ice guiding in New Hampshire’s White Mountains, and while working for RMI on Mount Rainier and in the North Cascades. His expedition experience includes Mount Everest in Nepal, Cho Oyu in Tibet, Ama Dablam in Nepal, Alpamayo in Peru, Denali in Alaska, Aconcagua in Argentina, Elbrus in Russia, Kilimanjaro in Tanzania, and many other peaks in Nepal and across the major mountain ranges of the United States.