From 1986 to 2006, Henri Markens was principal of the Joods Lyceum Maimonides (Jewish Maimonides High School) in Amsterdam. Since then he serves as director-general of the Organization for Jewish Education. He has also been chairman of the Organization of Jewish Communities in the Netherlands from 1994-2002. He was chairman of the CJO, the umbrella organization of Dutch Jewry, from 2000 to 2002.