P.C. Mohanan was a member, National Statistical Commission. He is also working as a consultant for the Food and Agricultural Organization (FAO) of the United Nations (UN). He retired from the Indian Statistical Service (ISS) in 2016. During his service, he worked in different capacities in the Central Statistics Office (CSO) and the National Sample Survey Office (NSSO). His published works are mainly on employment and unemployment, migration, housing, informal sector, and poverty among others. He was also a member of several high powered committees like Post-Sachar Evaluation Committee, Technical Group to estimate housing shortage, the committee for developing slum index, Expert Committee on Agricultural Statistics, etc.