Between 1957 and 1978 Judge made 124 senior appearances for Ireland, making his debut for Ireland in an away game against Scotland. He represented Ireland at the 1970 and 1972 EuroHockey Nations Championships and at the 1978 Men's Hockey World Cup. He also captained Ireland on 30 occasions and helped them win the 1972 Santander Trophy. In 2006 Judge was inducted into the inaugural Irish Hockey Association Hall of Fame. Other inductees included his former Ireland and Great Britain teammate, Harry Cahill, alongside Maeve Kyle and Thelma Hopkins.