Currently serving as the head coach for both the boys varsity soccer and boys varsity tennis programs, Marvinny has established a reputation for rebuilding and leading successful teams within the Greater Middlesex Conference (GMC). In his return to the tennis program during the 2022-23 season, he led the Chargers to a 12-2 record and consecutive GMC Gold Division titles over two springs. His success in tennis earned him GMC Blue Division Coach of the Year honors, mirroring his achievements on the soccer field where he surpassed 200 career wins in 2025. Known for his background in statistics and leadership, Marvinny is recognized for his ability to develop deep rosters and maintain competitive programs across multiple sports.