John Inglis was ordained a deacon December 13, 1801 by Bishop Charles Inglis, his father. On 27 June 1802 he was ordained a priest.
John was appointed as official secretary and as ecclesiastical commissary to his father. This involved a number of trips to England on behalf of the diocese. These trips also enhanced his own career and brought focus on his talents. However, his relative inexperience and the overtones of nepotism did not allow his promotion in 1812 when the bishop was seriously incapacitated.
Inglis became the third bishop in 1825. He was consecrated 26/27 March 1825. In the 25 years preceding this elevation, he had proven to be a talented and caring priest. He had been chaplain to the House of Assembly, a stalwart ally of King’s College, and a defender of the official position of the Church of England. He died on 27 October 1850.