David M. O'Connell

In August 2012, O'Connell was given records showing that a priest of his diocese, Matthew Riedlinger, had exchanged sexually explicit text messages with and tried to set up a meeting with a person he believed to be a 16-year-old boy. O'Connell removed Riedlinger from the parish where he was serving, but did not inform parishioners of the reason for his removal until a year later, when he was informed that The Star-Ledger would be publishing a story on the matter.

On June 4, 2010, O'Connell was appointed Coadjutor Bishop of the Diocese of Trenton by Pope Benedict XVI. O'Connell received his episcopal consecration on July 30 from John M. Smith, the Bishop of Trenton, with Archbishops John J. Myers and Donald Wuerl serving as co-consecrators, at the Cathedral of St. Mary of the Assumption in Trenton. He chose as his episcopal motto: Ministrare non ministrari, meaning, "To serve and not to be served" (Mark 10:45).

As coadjutor bishop, O'Connell automatically succeeded Smith on December 1, 2010, when the Pope accepted the resignation he had already tendered, after reaching the mandatory retirement age of 75.

On October 2, 2009 O'Connell announced that he was stepping down as President of the University in August 2010. On June 4, 2010, Pope Benedict XVI named him coadjutor bishop of the Diocese of Trenton.

He was the 14th President of the Catholic University of America (CUA) from 1998 until 2010. He also became a Consultor to the Vatican Congregation for Catholic Education in 2005 and was appointed as John Joseph Keane University Professor of the university in 2006.

In 1998 senior members of the Roman Catholic Church in the United States needed to address new requirements from the Vatican for higher education and a requirement that some educators take an oath of fidelity to these teachings. Although many opposed the oath, O'Connell took the oath on the final day of the conference.

Between 1990 and 1998, O'Connell served at St. John's University in New York City in various capacities. He was associate dean (1990–91) before serving as professor of theology and religious studies, academic dean, and dean of faculty (1991–98). He was also associate vice president from 1995 to 1998, and assistant legal counsel from 1996 to 1998. From 1994 to 1998, he served as Acting Vice President and Dean of Niagara University.

O'Connell was ordained a priest of the Congregation of the Mission by Joseph McShea, Bishop of Allentown, on May 29, 1982, in the chapel of the seminary. His first assignment was as a teacher at Archbishop Wood Catholic High School in Warminster, Pennsylvania, where he also served as Director of Student Activities from 1983 to 1985. He continued his studies at The Catholic University of America School of Canon Law in Washington, DC, receiving a Licentiate of Canon Law in 1987. From 1987 to 1990, he was registrar and an assistant professor of canon law, theology, and philosophy at Mary Immaculate Seminary. He earned a doctorate in canon law from the Catholic University in 1990. He also served as an ecclesiastical judge and canonical consultant to the Diocese of Harrisburg (1987–98), Diocese of Birmingham (1987–93), and Diocese of Scranton (1988–98).

O'Connell was born in Philadelphia, one of the four sons of Arthur J. and June O'Connell. He was raised in nearby Langhorne, Pennsylvania. Feeling drawn at an early age to the Catholic priesthood, he attended the Vincentian minor seminary, St. Joseph Preparatory High School, in Princeton, New Jersey. He received a Bachelor of Philosophy degree from Niagara University in Lewiston, New York, in 1978. He then studied at Mary Immaculate Seminary in Northampton, Pennsylvania, where he earned a Master of Divinity degree (1981) and a Master of Theology degree in moral theology (1983).

David Michael O'Connell CM (born April 21, 1955) is a prelate of the Roman Catholic Church, serving as the bishop of the Diocese of Trenton in New Jersey since 2010. He is a member of the Congregation of the Mission and a past president of the Catholic University of America in Washington, DC.