During the deployment of the Canadian combined armed forces in Somalia, Major Messier, then Captain, consistently demonstrated perseverance and courage, qualities that were noted by the senior allied officers. His work often required him to take serious risks and to cross areas that were mined and controlled by bandits. Between March 13 and 17, 1993, Major Messier conducted reconnaissance of the Galcaio region, contributing directly to the deployment of humanitarian assistance organizations in this previously neglected region. In addition, he constantly attempted to bring the rival factions to the conference table.