Former Cabinet Secretary and Principal Advisor in the Prime Minister`s Office (PMO), P.K. Sinha, has resigned from his post on personal grounds. Sources said the retired 1977-batch IAS officer of the Uttar Pradesh cadre put in his papers on Monday evening.

Sinha was appointed in the PMO in September 2019 following the general elections, after he retired as the Cabinet Secretary. The veteran former bureaucrat was earlier made the Officer on Special Duty (OSD) in the PMO on August 30, 2019 after Prime Minister Narendra Modi accepted the request of his Principal Secretary Nripendra Misra to be relieved from the post.