Duke has been the Head Professional, Director of Tennis and/or Club Manager/Director of RMTC Boulder – formerly Harvest House Tennis Club – for the past 30 years. A top-ranked junior player himself, Duke was also a two-time collegiate All American player. Duke was inducted into the Gustavus Adolphus Athletic Hall of Fame in 2010. He was the 2015 recipient of the USPTA Intermountain Manager of the Year. He has nearly 30 years of expert credentials as a professional coach, including PTR Master of Tennis-Performance certification.