Esper has been a guest artist/teacher at Canada's Banff Festival of the Arts as well as at the National Theatre School of Canada, the St. Nicholas Theater in Chicago, Illinois, and the Schauspiel München School in Munich. Together with his wife Suzanne Esper, who also teaches at Esper Studios, he has conducted numerous workshops throughout Europe, most notably at the National Film School of Denmark, the Norwegian National Academy of Theatre, and the National Theatre Mannheim. In 2008 Bill and Suzanne Esper introduced Meisner's work to Russia at the St. Petersburg State Academy of Theater.