Mark is the C.O.O. of Halcyon Dive Systems and a Board of Directors member of Global Underwater Explorers. He has nearly 50 years of dive experience and three decades of diverse business experience. As an avid cave explorer, he has “added line” to many systems in both Florida and Mexico. He is an accomplished entrepreneur creating and leading companies in locations around the world. He has contributed to articles and photographs in assorted publications such as Avian Biology, Time/Life and National Geographic magazine. Mark now lives in North Florida with his wife and dogs, where he continues to teach cave diving and jump out of perfectly good airplanes when given the opportunity.