 He served as the honorary director till 1957 and continued as a full-time director till his superannuation in 1964.Post his regular career, he was made the Honorary Professor of VPCI and the Emeritus Scientist of the Council of Scientific and Industrial Research (CSIR) and held both the posts till his death, involving himself in research, in post graduate medical education, in organizing medical conferences or delivering keynote addresses at various conferences in India and abroad.He also served as the Honorary Research Director cum Consultant at the Rajendra Memorial Research Institute of Medical Sciences, Patna and as a visiting professor at the University of Illinois (1958) and the University of Chicago, (1964).