He obtained 76 caps (one goal) for the France national team, won the 1984 European Football Championship and played in two World Cup semi-finals.

A longtime starter for FC Nantes during the club's most successful period during the 1970s and 1980s,[3] he was noted chiefly as a full-back on the left flank, but filled in at various roles in defence.

In 1985, Bossis moved to the ambitious RC Paris, but the Parisian club achieved only modest success in spite of heavy spending that acquired such players as Enzo Francescoli and Pierre Littbarski.

Bossis' younger brother, Joël, also played professional football and holds the all-time record for most goals scored for Chamois Niortais.

After he retired in 1991, Bossis briefly embraced a career as a football executive, heading the Coupe de France Central Commission (1993–1995) before he joined Saint-Étienne as sporting director (1996–1997).