Lucey was ordained a priest in 1927. He held the Chair of Philosophy and Political Theory at St. Patrick's College, Maynooth, from 1929 to 1950. Alongside Peter McKevitt, he was one of the founders of Christus Rex, a priestly society devoted to social issues, on which he was a prominent commentator. In November 1950 Lucey was appointed titular Bishop of Sila and auxiliary bishop of Cork with right of succession, and was consecrated bishop the following January. Upon the death of Bishop Cohalan, in August 1952, Lucey became Bishop of Cork. In 1958 the Diocese of Ross united with the Diocese of Cork. Shortly after his appointment as Bishop of Cork And Ross Lucey embarked on a plan to build five new churches in the rapidly developing suburbs of Cork. The five new churches were named after the five Glorious Mysteries of the Rosary. During his tenure, he founded a total of thirteen churches in Cork. He founded the St. Anne's Adoption Society in 1954. His outspoken sermons, often given at confirmations, made him something of a thorn in the side of the establishment. His views on matters of faith and morals were conservative, and he was involved in a controversy in the 1960s, when he withdrew the diocesan faculties of Father James Good, a lecturer at University College, Cork, for publicly dissenting from the teaching of Pope Paul VI. In 1965 Bishop Lucey started the Cork diocesan mission to Peru, where many priests from Cork ministered. The last of the Irish missioners returned from La Esperanza to Ireland in 2004. Lucey retired as bishop in 1980. He went to the Turkana District in Kenya to work as an ordinary curate with Fr. James Good, who had gone there some years earlier. Good later described the last two years of the Bishop's life and his reaction to Turkana customs:
Death and legacy
After nearly two years in Kenya he became seriously ill. He was flown back to Cork in May 1982, and was diagnosed with leukaemia. He died in September 24, 1982 at Bon Secours Hospital, Cork. In 1985, as part of the Cork 800 festival, a site between Grand Parade and South Main Street was developed into an urban park named "Bishop Lucey Park".
