In 1937 Bishop George Barnar ordained him to Church ministry following which he served as a chaplain in the British army. After retiring from service he served in Essa Nagri and later on the staff of Lahore Cathedral. He served Karachi Dioceses as an archdeacon for long time. Between 1994 - to 1997 he served the Christian community in the Oxford Dioceses in England.
According to the well-known Church historian, Dr. Yousaf Masih Yad, he was proud of the honour of having studied under the guidance of Qaziullah, the father of F.S. Khairulllah who became recognized by his monumental work Qamus-ul Kitab.
Roomal Shah was a religious leader, thinker, exegete and a very convincing writer. In UK he wrote continually in Tajali (monthly), Kalisiya International (quarterly) magazines. His published books are: Haqiqat-e Hayat, Haqiqat-e Taslees, and Hamara Virsa.
The Archdecan Inayat Roomal Shah fell ill in the beginning of 1997 and slept in the mercy of his Lord on 11 January 1997.