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Rev. Edmond M. Derosier


Father Edmond Derosier (Father D.) was ordained in 1973.  His previous assignments include St. John’s in Swampscott, Our Lady’s in Waltham and St. Thomas’ in Jamaica Plain.  In 1994 he was asked to pastor St. Anthony of Padua Parish in Shirley and oversee the rebuilding of the parish church.  In 2006, he was asked to pastor St. Mary’s Parish in Ayer to allow the parish to continue its long history of service.  He recently celebrated his 40th anniversary of ordination.


Sister Joan Guertin

Pastoral Associate:

Sister Joan has been the Pastoral Associate here at St. Anthony since July 2006. The Holy Union Sisters are an international Congregation, whose charism is union and reconciliation. We minister on four continents. Some of the ministries I have been engaged in over the years are teaching, administration and retreat work.


Donna Vaira

Coordinator of Religious Education



Donna manages all aspects of our religious education programs.


Email: office@stmarysayer.org


Pastor: Rev. Edmond M. Derosier 978-425-4588
Pastoral Associate: Sr. Joan Guertin, S.U.S.C. 978-772-2414
Parish & Cemetery Manager: Betsy Diskin 978-772-2414
Religious Education Coordinator: Donna Vaira  978-772-7474 ayerccd31@comcast.net

Post-baptismal: Ivette Manrique

  • RICA: Kathey and Bob Eldredge 
  • Theology on Tap: Julie Murray at nashobatot@gmail.com
  • Youth Group: Joe Leone

Finance Council:
Fr. Derosier, Sister Joan, Betsy Diskin, Paul Bresnahan, Penny Cadogan, Glen LaPierre, Walter Miska, and Robert Lewis.

Parish Council:
Fr. D, S. Joan, Louise Bresnahan, Brian Gill, Pauline Hamel, Murray Heald, Karen Januskiewicz, Tim O’Keefe, Loren St. Peter and Scott Wick.



Not sure who to contact?

Use our online contact form to send a note the the parish office.

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