Pariat was one of the longest-serving chief secretaries in Meghalaya, who was in office since October 10, 2009.
A resident of Shillong, Warjri graduated from St Edmund's College, Shillong in 1976, and went on to study International Studies at the Jawaharlal Nehru University, New Delhi.
He joined the civil service in 1978 where he was allotted the Manipur-Tripura cadre and served there until 2008 and joined the North Eastern Council in the capacity of a director.