|Date of birth||13 August 1976|
|Place of birth||Lanús, Argentina|
|Height||1.80 m (5 ft 11 in)|
|Playing position||Left back|
|1998||→ Espanyol (loan)||5||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 23:35, 29 July 2012 (UTC).
† Appearances (Goals).
Domínguez began his professional career with Vélez Sarsfield, where he won the Copa Libertadores in 1994. He played the 1998/1999 season with Spanish Espanyol, but returned to Vélez to play until 2002. That year he moved to Independiente.
Domínguez joined Mexican Santos Laguna after playing the first half of the 2003/2004 season with Spanish Second Division Leganés. Joining Santos for the 2004 Clausura, Domínguez immediately became an important player, starting 15 of 19 games for the club and scoring one goal. He repeated his performance in the Apertura of that year, appearing in 13 games and scoring twice.
In 2009 he was signed by new Argentinos Juniors manager Claudio Borghi and became an important member of the Argentinos Juniors team that won the Clausura 2010 championship. He played in 15 of the clubs 19 games during their championship winning campaign and was one of the few players in the team to have any previous championship winning experience.
National team statistics
|Argentina national team|
- Argentine Primera División (3): Apertura 1995, Clausura 1996, Clausura 1998
- Copa Libertadores (1): 1994