Senior IAS officer Rajiv Gauba took charge as the Union Home Secretary after incumbent Rajiv Mehrishi superannuated on Thursday.
A 1982 batch IAS officer of Jharkhand cadre, Mr. Gauba will have a fixed two-year tenure.
Mr. Gauba served as Officer on Special Duty in the Home Ministry since June 27 after his name was announced as the new Home Secretary.
He had served as Secretary in the the Union Urban Development Ministry before being given the new assignment.
Earlier, he had worked in the Home Ministry as Additional Secretary, looking after the crucial left wing extremism division, among many other responsibilities.
Served in Jharkhand
Born in Punjab in 1959, Mr. Gauba had graduated in Physics from Patna University.
He served in Jharkhand as the Chief Secretary for 15 months before joining the Central government last year.