From 1943 to 1945, he was a physical education instructor and assistant track and basketball coach at the Navy school at Columbia University.
He then served as director of physical education and basketball coach for the Stevens Institute of Technology V-12 Navy College Training Program.
[6] In 1955, Elespuru moved to Sacramento State University, where he was an assistant football and track coach and established the school's boxing program.
[2] He was a referee or judge for over 40 world title fights, including Salvador Sánchez vs. Wilfredo Gómez, Jeff Fenech vs. Carlos Zárate, Záratevs.
Alberto Dávila, Lloyd Honeyghan vs. Jorge Vaca, Julio Cesar Chavez vs. Roger Mayweather, David Tua vs. Ike Ibeabuchi, John John Molina vs. Tony Lopez, Yaqui López vs. Carlos De Leon.