|Date of birth||13 April 1966|
|Place of birth||Menzel Jemil, Tunisia|
|Height||1.89 m (6 ft 2 in)|
|1991–1992||→ Nancy (loan)||7||(0)|
|* Senior club appearances and goals counted for the domestic league only.
The Tunisian international began his career in FC Gueugnon in France, however without playing any games. His first game as a professional footballer came on October 20, 1991 for AS Nancy in a 1:3 loss to AJ Auxerre. Afterwards he returned to his previous team, where he played five seasons, until changing to SC Bastia. He played for Bastia for six years, and then one season at FC Rouen. In 2004, he moved back to Tunisia to play for Club Africain.
In the national team he debuted on November 27, 1991 against Côte d'Ivoire. Having established himself as a competitive goalkeeper he went on to play for Tunisia in the 1998 FIFA World Cup, 2002 FIFA World Cup and 2006 FIFA World Cup . Boumnijel was Tunisia's first choice goalkeeper, and played at the 2004 African Nations Cup where the Tunisia team won. In the semifinals he saved a crucial penalty from Peter Odemwingie to help Tunisia beat Nigeria in a penalty shootout.