Topčić actively participated in World War II in Yugoslavia from the beginning of 1941, on the Partisans side. After liberation he was the editor of Sarajevo radio station. Topčić was the Secretary General of the Association of Writers of Bosnia and Herzegovina (then "Udruženje književnika Bosne i Hercegovine", now "Društvo pisaca Bosne i Hercegovine", whose founder, Secretary General, from 1993 to 2001, and a Board member, from 2006 to 2010, was his son Zlatko).