Husillos started his professional playing career in 1977 with Boca Juniors, where he was part of the squad that won the Copa Libertadores in 1978.
[2][3] He also played for San Lorenzo, where Rubén Cousillas was a goalkeeper and trainer, and later with Real Murcia, Estudiantes de La Plata and New York Cosmos, where he had a brief spell with the exhibition side of 1985.
[2] Husillos served as director of youth football at Deportivo Morón, before moving to Tigre, where he was assistant coach.
He returned to Morón as head coach, and then moved to Almagro, earning his first managerial appointment after a year as a trainer.
[8] In August 2012, Husillos joined Málaga CF, then managed by Manuel Pellegrini, as sporting director, with a contract that ran until June 2013.
[11] The following week, he was appointed director of football for English Premier League club West Ham United.