Engler was a member of the Yugoslavia national team that participated at the 1950 FIBA World Championship in Buenos Aires, Argentina. Over three tournament games, he averaged 1.0 point per game. The World Championship in Argentina was the inaugural tournament. At the 1953 FIBA European Championship in Moscow, the Soviet Union, he averaged 6.5 points per game over eight tournament games. At the 1954 FIBA World Championship in Rio de Janeiro, Brazil, he averaged 5.8 points per game over five tournament games. At the 1957 FIBA European Championship in Sofia, Bulgaria, he averaged 4.8 points per game over nine tournament games.