St. Mary's Parish

"To know Christ and to make Him known..."


St. Mary's Catholic Church
8 Church St
Holliston, MA 01746
Rectory 508∙429∙4427 or 508∙879∙2322
Religious Education
FAX 508∙429∙3324

Parish Clergy

Rev. Mark J. Coiro, Pastor

Deacon John Barry, Permanent Deacon
Deacon Martin Breinlinger, Senior Deacon
Deacon Philip Caruso, Senior Deacon


Rev. Mark J. Coiro

Pastor, (photo top center group)

Fr. Mark is a 1990 graduate of St. Anselm College in Manchester New Hampshire, where he received his Bachelor’s Degree in Theology and Certification in Classics in 1990. He then attended St. John’s Seminary in Boston, receiving his Master of Divinity with a specialization in Systematic Theology in 1994.

While in seminary he joined the United States Army Reserve as a Chaplain Candidate, being commissioned a Lieutenant in the Staff Specialist Branch. In this capacity he served active duty tours at Fort Leonard Wood, MO; Letterman U.S. Army Hospital in San Francisco; and also with the 364th Armor Battalion in Schweinfurt, Germany.

On May 21, 1994 he was ordained a priest at the Cathedral of the Holy Cross in Boston. Fr. Mark said his First Mass of Thanksgiving at St. Clement’s Parish in Somerville, then served as Parochial Vicar in the Parishes of St. Theresa’s in Billerica, St. Jerome’s in N. Weymouth, and St. Joseph’s in Medway.

In October of 2005, Archbishop Sean O’Malley ended Fr. Mark’s assignment as Parochial Vicar in Medway, and named him as the fourteenth Pastor of the neighboring parish of St. Mary’s, Holliston.  Father Mark is always available to meet with parishioners to hear their ideas, needs, concerns, and dreams for St. Mary’s Parish.  He considers himself truly blessed to be part of one of the most vibrant and spirit filled parishes in our Archdiocese.

In addition to his parish ministry, Fr. Mark is privileged to serve the Church as a Knight of the Equestrian Order of the Holy Sepulchre of Jerusalem.  Let us all pray and work for peace in the Holy Land, and together support our Christian brothers and sisters in the land of Our Saviour’s birth.

Deacon John BarryDeacon John Barry
Permanent Deacon, (photo left)

John Barry was ordained to the permanent diaconate on September 21, 2013. John grew up in Bristol Connecticut, the youngest of seven children. His parents (William and Jane) and his oldest sister (Kathleen Rose) are deceased. His brother Bob, also a deacon, currently serves at the Church of St. Patrick in Farmington, Connecticut. The great love and strong faith of his parents and siblings (Jane, Colleen, Bill, Mike and Bob) have helped to form John’s understanding of God’s infinite love for each of us.

After having received a degree in graphic design and illustration from LIU Southampton, John married Diane Grabowski on October 8, 1988. Moving to Massachusetts, John worked as a graphic designer at an architectural firm in Watertown for seventeen years. Settling in the Holliston area shortly after their marriage, Diane and John became active members of St. Mary’s parish.

In December of 2007 John received a master’s degree in Art Education from Framingham State University, and began teaching art at both the elementary and high school levels. John and Diane currently reside in Medway with their children Sarah, David and Nolan.

Deacon Martin Breinlinger 
Senior Deacon, (photo top left group)

Martin (Marty) Breinlinger was ordained to the diaconate in 1976, the first deacon class in the Archdiocese of Boston. His training took place at St. John’s seminary.

After ordination, Marty received a certificate in Pastoral Ministry from Emmanuel College. He has served at St. Mary’s since ordination. He and his wife, Mary Alice, were involved in family ministry for many years. Additionally he has been involved in the RCIA program, ministry to the divorced and separated, and religious education. Currently Marty is directing the Ministry to the Homebound.

Marty is retired from the Polaroid Corporation and currently teaches negotiation and mediation at Clark University in Worcester. He has been a resident of Holliston since 1966. 

Deacon Philip Caruso
Senior Deacon, (photo top right group)

Deacon Philip Caruso grew up in Boston and was a member of Holy Name Parish. He attended Boston college High School, then Boston College, where he received a B.S. in Biology. His education continued at Georgetown University School of Dentistry.

While in high school and college, he was in the United States naval Reserves in submarine service and qualified as a submariner.

While in dental school, he married Diane Mahony on December 28th, 1963.

After dental school, he was stationed with the third marine Air Wing as a Navy dentist at El Toro in Tustin, California.

Deacon Caruso and his family have lived in Holliston since 1969. He and his wife have five children. He is in private practice in Holliston and is also a dentist for the Sisters of Saint Joseph at Bethany Health Care Center.

He was ordained for the Permanent Diaconate on May 14th, 1983 and has been serving St. Mary’s happily ever since