Bishop Tikhon was born Marc R. Mollard in Boston, MA on July 15, 1966, the oldest of three children born to Francois and Elizabeth Mollard. After brief periods living in Connecticut, France, and Missouri, he and his family settled in Reading, PA, where he graduated from Wyomissing High School in 1984. In 1988 he received a Bachelor of Arts degree in French and Sociology from Franklin and Marshall College, Lancaster, PA, after which he moved to Chicago.
In 1989 he was received into the Orthodox Church from Episcopalianism and, in the fall of the same year, he began studies at Saint Tikhon's Seminary, South Canaan, PA. One year later he entered the monastic community at Monastery of Saint Tikhon of Zadonsk as a novice.
After receiving his Master of Divinity degree from Saint Tikhon's Seminary in 1993, he was appointed instructor in Old Testament at Saint Tikhon's Seminary. He continues to serve as Senior Lecturer in Old Testament, teaching Master level courses in the Prophets and the Psalms and Wisdom Literature. He is also an instructor in the seminary's Extension Studies program, offering courses in the lives of the Old Testament saints, the liturgical use of the Old Testament, and the Old Testament in patristic literature.
Bishop Tikhon collaborated with Igumen Alexander (Golitzin) in the publication of "The Living Witness of the Holy Mountain," published by Saint Tikhon's Seminary Press, by illustrating this classic book about Mount Athos.
In 1995 he was tonsured to the Lesser Schema by then Archbishop Herman, and given the name Tikhon, in honor of Saint Patriarch Tikhon, Enlightener of North America. Later that year he was ordained to the Holy Diaconate and Holy Priesthood at Saint Tikhon's Monastery. In 1998 he was elevated to the rank of Igumen, and in 2000 to the rank of Archimandrite.
In December 2002, he was appointed by Metropolitan Herman to serve as Deputy Abbot of Saint Tikhon's Monastery.
His Beatitude, Metropolitan Herman presided at the consecration of Archimandrite Tikhon to the episcopacy at the Monastery of Saint Tikhon of Zadonsk on Saturday, February 14, 2004.
On May 9, 2012, he was elevated to the dignity of Archbishop.
On November 13, 2012, Archbishop Tikhon was elected Primate of the Orthodox Church in America at the 17th All-American Council.