He begins his professional career in 1977 by basing Stratos with Raphael Garrido (lead vocal), Didier Bernoussi (2nd guitar), Henri Barbut(drums), Alain Pernette (bass). He records with this formation a demo (3 titles).
He leaves this band for "personal" reasons...the formation taking then the name of Warning.
In 1981, he joins Satan Jokers for three albums of heavy metal (published from 1983 till 1985) and several tours.
After the split of Satan Jokers in july 1985, he joins for a short duration Attentat Rock, but he leaves this band after a tour (Attentat Rock supporting Mama's Boys).
Stéphane Bonneau in 1988 under " Stephen's " pen name registers a single for EMI who will not be born.
In 2009, he plays as guest on Satan Jokers new album "SJ 2009" but do not participate in the reformation.