Martin was ordained to the priesthood for the Franciscan Order on June 10, 1989, by Bishop John Huston Ricard at St. Casimir Church in Baltimore.
[3][4] After his ordination, the Franciscans assigned Martin as a teacher and coach at Saint Francis High School in Athol Springs, New York.
Martin led a successful $7 million capital campaign at Archbishop Curley and increased its enrollment after a decline during the 1990s.
[3] On April 9, 2024, Pope Francis accepted the resignation of Bishop Peter Jugis of Charlotte due to his "chronic but non-life-threatening" kidney issues, and appointed Martin as his successor.
[3][6][7] With Martin's appointment, the Conventual Franciscans became the most represented religious community among the active bishops of the United States.