 From 1991 to 1998 he led the vaccines division, first as Vice President and General Manager, then Senior Vice President and General Manager, until his appointment as President and General Manager in 1998.Since 1998, Jean Stéphenne is President and General Manager of GlaxoSmithKline Biologicals.In 2001, Stéphenne was raised into the Belgian nobility by King Albert II and given the noble title "Baron" for life.