Sylvain Ducange was born on 5 April 1963 in Port-au-Prince. He entered the Salesian novitiate in Jarabacoa in the Dominican Republic in 1985. He made his perpetual profession in Brussels in 1992 and was ordained priest in Port-au-Prince on 8 July 1995.
He was Rector of the Fondation Saint-Vincent School in Cap-Haïtien (1989-1991) and of Carrefour-Thorland (1998-2004), and then Rector and Economer in Pétion-Ville (2004-2010).
For the Vice-Province he was a member of the Council (2000-2007), Delegate for Youth Ministry (2004-2006) and for Formation (2006-2007), before assuming, in January 2010, the office of Superior which he held until January last.