Fr. Peter, along with his brother John and sister Suzanne, was born to Jiri and Helena Marsalek in Burlington, Ontario, Canada. He attended Catholic elementary and high schools prior to enrolling at McMaster University in Hamilton, Ontario.
Fr. Peter graduated with a degree in Civil Engineering and Management and was a three time intercollegiate university champion in tennis. Following his graduation from McMaster, he completed a two year Master of Science in Engineering degree from Queen’s University in Kingston, Ontario.
Responding to a desire to serve at a Catholic mission, Fr. Peter taught math and physics for one year at Mount Carmel High School in Belize, Central America. During his time in Belize, he discerned his vocation to the sacred priesthood and entered seminary formation with the Society of Our Lady of the Most Holy Trinity (SOLT).
Fr. Peter was ordained to the priesthood on January 28, 2005, by John Patrick Cardinal Foley and completed his doctorate in sacred theology, specializing in Thomistic studies, at the Pontifical University of Saint Thomas Aquinas (The Angelicum) in 2010. Following ordination, he served for two years as an associate pastor at St. John Baptist de la Salle Parish in Rome (2005-2007), followed by two years as the Director of Religious Education and The St. Paul School of Catechesis for the Diocese of Corpus Christi (2007-2009).
In August 2009, he began two years of service as President of St. John Paul II High School and Bishop Garriga Middle School in Corpus Christi, TX, prior to being called by his community to serve on its General Council, serve as Rector for the SOLT seminarians in Detroit, MI and teach at Sts. Cyril and Methodius Seminary from 2011-2013.
In July 2013, Fr. Peter was elected as the fourth General Priest Servant in the history of the SOLT community.