Mary J. O'Brien, 90, of East Petersburg, passed away, Wednesday, January 06, 2010 at Lancashire Hall Nursing Home. Born in Philadelphia, she was the daughter of the late Elizabeth (Leddy) and Patrick Keenan. Mary was the wife of the late William O' Brien who died in July of 1990.

Mary was Assistant Chief Operator for Bell Telephone for 35 years. She was a member of St. John Neumann Catholic Church. Mary enjoyed dancing, big band music, the Jersey shore and was very passionate about animals.

Mary is survived and missed by her loving daughter, Patricia M. Mackley of East Petersburg, and family, 2 grandchildren, 4 great grandchildren, 2 step-grandchildren, and 4 step great grandchildren. She was preceded in death by a daughter, Mary Kathleen O' Brien, and a  brother James Keenan.

A Mass of Christian Burial will be held Monday, January 11, 2010 at 10 a.m. at St. John Neumann Catholic Church 601 E. Delp Rd. Lancaster 17601 with Msgr. Richard Youtz as Celebrant. Family and friends will be received at the Church before the service from 9-10 a.m. Interment will follow at Holy Sepulchre Cemetery, Philadelphia.

In lieu of flowers memorial contributions can be made to Susquehanna Assn. for the Blind/Visually Impaired 244 N. Queen St., Lancaster, PA 17603 or Humane League 2195 Lincoln  Highway East, Lancaster, PA 17602. Arrangements by Charles F. Snyder Jr. Funeral Home and Chapel 3110 Lititz Pike Lititz 17543. To send an online condolence or for more information please visit snyderfuneralhome.com