[3] In 1985, he led an international student protest against US President Ronald Reagan's visit to a cemetery in Bitburg, Germany that contained Nazi SS graves.
[3] Later that year, he was arrested for staging a sit-in at the offices of Soviet airline company Aeroflot during the Geneva Summit.
[3] Ronen succeeded Goldie Hershon as national president of the Canadian Jewish Congress (CJC) in 1998.
[5] As CJC president, he successfully advocated the recognition of Yom Hashoah by each provincial government in Canada as a means of remembering and educating people about the Holocaust.
[3] In January 1999, he accompanied Prime Minister Jean Chrétien on a visit to the Auschwitz-Birkenau extermination camp.