 In 1987, Constantino was selected for the U.S. team which went to the U-20 World Cup in Chile.Constantino played all three games as the U.S. went 1-2 in group play; failing to qualify for the second round.Constantino earned his lone cap with the United States men's national soccer team in a 1-0 loss to Guatemala on January 10, 1988 in Guatemala City.