Born in Oak Lawn, Ill., Father Guest earned a bachelor’s degree from Loyola University with a double major in Biology and Theology and also holds a master’s degree in Hebrew Bible from Vanderbilt University in Nashville, Tenn. After holding various jobs in Chicago, he entered Mount St. Mary’s Seminary in Emmitsburg, Md., graduating in 1994. His diaconate assignment was at St. Lawrence the Martyr Parish in Alexandria.

Fr. Guest was ordained on May 21, 1994, and was appointed Parochial Vicar at St. William of York Parish in Stafford. In 1998, he became Parochial Vicar at St. Catherine of Siena in Great Falls and was appointed Parochial Administrator at St. Theresa in Ashburn in 2002, becoming Pastor in 2004.

During his time at St. Theresa, Fr. Guest oversaw the construction of the parish church, additional parking, and a multipurpose addition to the parish school building.

Personally, Fr. Guest enjoys travel and baseball.