With the "Colchoneros" Aguilar was mainly a reserve, but contributed with 18 games and two goals as the club won the 1977 national championship. He also appeared the full 90 minutes in the second match of the 1974 Intercontinental Cup against Club Atlético Independiente, helping the hosts win it 2–0 and overcome the 0–1 first-leg deficit to conquer the tournament.