Dineshwar Sharma will hold a dialogue with stakeholders in Jammu and Kashmir.
Singh told reporters that a sustained dialogue will be initiated with all shades of opinion in Kashmir Valley.
Sharma, a 1976 batch Kerala cadre IPS officer, retired as director of the IB on December 31, 2016.
He will hold the the position of a Cabinet Secretary. However, on talks with separatists, Rajnath said the interlocutor will be free to decide whom to talk to.
Sharma, took charge as the interlocutor for peace talks with Assam's insurgent groups, including the United Liberation Front of Asom (ULFA).
