Dr Ajay Kumar currently works as the Deputy Director (Center for Operational Research) of the International Union Against Tuberculosis and Lung Disease and also leads the operational research initiatives of the South-East Asia Regional office. He is actively involved in conducting and publishing operational research in TB, HIV and Diabetes Mellitus. He organizes and facilitates many international and national courses on operational research and mentors young researchers across the globe (India, Asia, Africa, Europe and South Pacific).