|Cohen's long and dedicated service to lacrosse began in 1934 as a defenseman at the New York Military Academy.
In 1937, Cohen played defense for the Lafayette College Club team before switching to attack in 1939. Cohen won the 1939 Pennsylvania High Scorer Award and was named a All-Pennsylvania Star in 1939 and 1940. He was also captain ofthe 1940 team. He played for the Boston Lacrosse Club in 1941, 1946 and 1947.
Most recognized for instituting , developing, and coaching numerous lacrosse programs for over 25 years, Cohen established programs on Long Island for midget lacrosse beginning in 1964, high school summer lacrosse in 1972 and post-high school lacrosse in 1975. He founded the North Hempstead L.C. in 1982.
Cohen was a selector and administrator for the USA Team in the 1986 and 1990 World Games. He was also responsible for establishing the USCLA and the USLCA as tax-exempt non-profit corporations.
Cohen has served as President, Treasurer and Representative, USCLA; Executive Committee, USLCA; and member, Lacrosse Foundation Board of Directors(1985-1988). Cohen received the Wittelsburger Award in 1984 and was inducted into the Long Island Lacrosse Hall of Fame in 1986. He has received many other awards for outstanding contributions to lacrosse. Each year, the Long Island Midget Lacrosse League presents the Harvey Cohen Achievement Award in honor of Cohen's devotion and service to lacrosse.