Bishop Michael John Sheridan was born in 1945 in St. Louis, Mo., the older of two children of Bernice and John Sheridan. He grew up in the suburb of Jennings, where he attended Corpus Christi Catholic School from 1951-59. He graduated from St. Louis University High School in St. Louis in 1963.
After attending Rockhurst College in Kansas City, Mo., for one year, Bishop Sheridan entered Cardinal Glennon College Seminary in St. Louis. He graduated in 1967 with a Bachelor of Arts degree in Philosophy. From there, he entered Kenrick Seminary in St. Louis. He was ordained to the priesthood by Cardinal John J. Carberry in 1971, having earned a Master of Divinity degree.
After his ordination, he received a Master of Arts degree in Historical Theology in 1973 at St. Louis University. In 1974 he began a three-year stay in Rome, where he attended the Pontifical University of St. Thomas Aquinas (Angelicum). There he earned a License in Sacred Theology (S.T.L.) in 1976 and, four years later, a Doctorate in Sacred Theology (S.Th.D.)
Bishop Sheridan served the Archdiocese of St. Louis as an associate pastor in several parishes before being named pastor of Christ the King Parish in University City, Mo. in 1988. He served as pastor of Immacolata Parish in Richmond Heights, Mo., from 1993 until 1997.
St. Louis Archbishop Justin Rigali ordained Bishop Sheridan as an auxiliary bishop of the archdiocese on Sept. 3, 1997. On Dec. 4, 2001, Pope John Paul II appointed Bishop Sheridan coadjutor bishop of the Diocese of Colorado Springs. Bishop Sheridan was formally welcomed to the diocese on January 30, 2002. He became the diocesan bishop on January 30, 2003. Bishop Sheridan retired on June 29, 2021.
Bishop Sheridan is a well-respected teacher of the faith and has taught theology on the high school, college and graduate levels, including 10 years as a professor of Systematic Theology at Kenrick Seminary. He has served on the Board of Trustees of St. John Vianney Seminary in Denver and Kenrick-Glennon Seminary in St. Louis. He served on several committees for the United States Conference of Catholic Bishops, including the Committee on Catholic Education, the Committee on Priorities and Plans and the Administrative Committee.