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. The 1977–78 season also saw the club win the Liberty Cup and the Intercontinental Cup. He played for Real Madrid Castilla during the 1978–79 season, returning to Boca for 1979–80. This was followed by a spell at Loma Negra, where his 11 goals in the 1983 Nacional championship earned him top scorer honours. 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. He moved to CD Málaga and saw the club win promotion to the Spanish First Division in 1987–88. After three years at Malaga, he moved to CD Tenerife and saw the club also achieve promotion. This was followed by two seasons at Cádiz CF. Husillos then played for Cartagena FC, returning to CD Málaga during the 1991–92 season. After a spell at CD Cieza, he ended his career at Málaga club Atlético Malagueño in 1993–94.
Managerial career
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. He guided the club to promotion from the Primera B Nacional to the Argentine Primera. He resigned ten games into the Apertura 2000 tournament. After spells at Unión Central in Bolivia as head coach, a return to Almagro as coach, and then Real Murcia as athletic director and coach, he joined Al-Ittihad Jeddah in Saudi Arabia as director of football for the 2008–09 season. He managed Málaga B between 2006 and 2007. In August 2012, Husillos joined Málaga CF, then managed by Manuel Pellegrini, as sporting director, with a contract that ran until June 2013. In December 2013, he returned for a second spell in the role. He returned to Málaga, again as sporting director, in October 2017. He came in for criticism for his transfer selections in a season that ended in relegation to the Segunda Division. He left the role on 8 June 2018. The following week, he was appointed director of football for English Premier League club West Ham United. Following the sacking of Manuel Pellegrini in December 2019, Husillos also left the club.
Outside football
Husillos has worked as a commentator for Punto Radio and written a column for Marca.
