Bernard Teissier (French pronunciation: [tɛsje]; born 1945)[1] is a French mathematician and a member of the Nicolas Bourbaki group.

Teissier attained his doctorate from Paris Diderot University in 1973, under supervision of Heisuke Hironaka.

[4] He was a member and a leading figure of Nicolas Bourbaki.

[5] Along with Alain Connes, he gave the 1975/1976 Peccot Lectures.

He was an invited speaker at the International Congress of Mathematics at Warsaw in 1983.