Peter was ordained to the priesthood on 3 October 1966 in Order of Friars Minor Capuchin congregation.

Elampassery was appointed 2nd Bishop of the Roman Catholic Diocese of Jammu–Srinagar, India, on 3 April 1998.

[6] Peter Celestine received his Doctorate in Missiology from Pontifical Gregorian University, Rome, Italy in 1978.

He died on 27 May 2015 at Assisi Ashram, Bharananganam, Kerala after prolonged illness and massive heart attack.

[7] Early Capuchin Mission in India[8] Dr. Peter Celestine Elampassery OFM, Cap Received Gandhi Peace Award from Government of Jammu and Kashmir for the formation of peace clubs in schools, cross-border dialogue, and inter-religious meets.