Born at Mattom on the 7 February 1934, Mar Paul Chittilapilly did his priestly studies at St. Joseph's Seminary, Aluva and the Propaganda Fide College, Rome. On the 18 October 1961 he was ordained priest at Rome by the late Archbishop of Changanassery Mar Mathew Kavukatt.
He took Doctorate in Canon Law from the Pontifical Lateran University, Rome. After his return to India in 1966, he was appointed assistant Vicar at Aloor, the professor at St. Thomas' Apostolic Seminary, Kottayam, Chancellor of the Eparchy and Manager of St. Thomas College, Trichur.
In the Year 1978, he was appointed Vicar General of the Eparchy of Trichur. On the 12 May 1987 he had been deputed to lead a team of priests who were sent to take up and organize the pastoral care of the Syro-Malabar Catholics in Mumbai.
He was nominated the first bishop of the newly erected Eparchy of Kalyan by Pope John Paul II on 19 May 1988. He was consecrated Bishop at Mattunga (Bombay) on the 24 August 1988 by His Eminence Mar Antony Cardinal Padiyara. He became the Bishop of Thamarassery on 8 February 1997. He retired on 8 April 2010 and died on 6 September 2020.