PK Sinha, currently functioning as OSD in the Prime Minister's Office, has been appointed the Principal Advisor to the Prime Minister Shri Narendra Modi.Shri Sinha served as Cabinet Secretary from 13th June 2015 to 30th August 2019. He was a 1977 Batch IAS officer from Uttar Pradesh Cadre. During his illustrious career, Shri Sinha has served as Secretary in the Ministries of Power and Shipping. He also served as Special Secretary in the Ministry of Petroleum and Natural Gas.He did his graduation in Economics from St. Stephens College, University of Delhi. Thereafter, he did postgraduation in Economics from Delhi School of Economics. Subsequently, while in service he also obtained the Masters Diploma in Public Administration and an M. Phil in Social Sciences.During his long stint in the IAS, Shri Sinha has served with distinction in various capacities both in the State Government of Uttar Pradesh as well as at the level of Central Government.At the State Government level, Shri Sinha has held various assignments such as District Magistrate of Jaunpur and Agra, Commissioner of Varanasi, Secretary (Planning) and Principal Secretary (Irrigation), etc. He has served for many years in the Central Government – mainly in the Energy and Infrastructure Sectors, such as, Ministry of Petroleum & Natural Gas, Ministry of Power, and Ministry of Shipping. He has specialized in the areas of Energy, Infrastructure, and Finance.