From to , he played 21 matches for the France national team while also making three appearances for the Corsica national team. In , he joined Toulon and made his professional debut in the —98 season , while the club was playing in Ligue 2. After a year with Toulon, Squillaci joined Monaco. He spent two seasons on the club's reserve team before joining AC Ajaccio on loan for two years.
Squillaci returned to Monaco in and contributed to the team that won the Coupe de la Ligue in He also featured in European competition for the first time in his career and, in the —04 season , played on the Monaco team that reached the UEFA Champions League Final. In , Squillaci signed a long-term contract with league rivals Olympique Lyonnais and won two consecutive league titles, as well as the Coupe de France in before departing for Spain in to join Sevilla.
With Sevilla, he appeared in over 65 matches and won the Copa del Rey in his final season with the club. In , Squillaci signed a three-year contract with English club Arsenal where he also reached the Football League Cup final. Squillaci is a former France international and made his debut in August in a friendly match against Bosnia and Herzegovina.
Squillaci was born in Toulon , Var. The couple moved to the mainland from the commune of Ghisonaccia in Haute-Corse.
Squillaci is married and has a son, Aaron. The group was created by Peace and Sport , a Monaco -based international organisation. Squillaci began his football career playing for hometown club FC Seynois. While training at La Seyne, he was described by his coach Franck Seva as a "lovely, quiet boy". He was originally a defensive midfielder and spent only one season in the club's youth academy, where he was supervised by former club player Christian Dalger.
