Moussa Ba, a national from Senegal, is the Chief of the Critical Incident Stress Management Unit (CISMU) of the Department of Safety and Security (DSS), since the creation of the Department in 2005. CISMU is responsible for the Prevention, Management of Stress and Critical Incidents Stress UN system wide. As such, the Unit chief is the coordinator of all Critical Incident Stress Management (CISM) activities for
the United Nations system during major disasters, providing a unified response and coordinated operations

Prior to that he was appointed by UNICEF as a Program Officer in emergency countries in Western and Central Africa before joining the former UNSECOORD office at UNHQ in December 2002 as a Regional stress counsellor in charge for the West Africa region and DPKO Missions

Dr. Ba is one of the 10 Experts of the task force that was hired by the UN Department of Social Affairs to design the World Plan of Action for Disabled People for the years 2000 and beyond (1992). In that committee he was President of the Group in charge Prevention.

He received an award from President Chirac for his work on Improving Mental Health at the International level (1994) and from President Clinton (1996) for his leadership on Improving Quality of Life in Africa.