Marvin has held prestigious roles, including High-Performance Director at the Billie Jean King National Tennis Center (BJK/USTA/NTC), where he was instrumental in shaping high-performance programs for rising talents. He also served as the USTA/Eastern 16 Boys & Girls Coach for over 20 years, further cementing his expertise in developing junior players.

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Internationally, Marvin has coached teams in Côte d'Ivoire (West Africa) and Trinidad and Tobago, gaining valuable global experience. As a former ATP Tour Coach, he worked with some of the best professional players, bringing a wealth of high-level competition insights.

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In addition to his coaching credentials, Marvin is a certified Life Coach and the founder of MS Dent Consulting, where he advises and mentors athletes, helping them reach their full potential both on and off the court. Marvin’s diverse background and holistic approach make him a valuable leader and contributor in the tennis community.