SisterMary Kay Oosdyke

I have found that wisdom and peace come slowly amid the world’s deep human suffering and the clamors of my own human heart. My hope remains firm when my heart maintains its focus on our awesome and amazing God who graces each of us with daily opportunities to help one another. I laugh and am grateful for all I have seen transformed by goodness and strength born of abiding faith and generous service.

Mary Kathryn was born on July 31, 1942 in Kalamazoo to James and Loretta Oosdyke at “Borgess Hospital where gorgeous babies are born.” The family moved back to Grand Rapids early in Mary Kay’s life, and the birth of her sister Diane completed the family. She attended local parish schools and Mount Mercy Academy. In 1960 she joined the congregation and received the name Sister Mary Amanda of Our Lady of Perpetual Help, later returning to her baptismal name.

Sister Mary Kay received a BA, and an MA in Religious Education from Aquinas College,and an MA in Education from Michigan State University. Later she earned an MA in Systematic Theology from the Aquinas Institute of Theology in St. Louis and a Ph.D. in Theology and Education from Boston College.

She began her teaching career in 1965 in elementary schools in Michigan. In 1972, she began teaching at Aquinas College, first in the Education Department and later in the Theology Department. In the 1990s, Sister Mary Kay was the Director of the Graduate Ministry Program at Ursuline College in Cleveland, Ohio and in 2003 she became Academic Dean at Aquinas Institute of Theology in St. Louis, Missouri.

Sister Mary Kay served as director of the congregation’s Associate Life program from 2008-2017. She taught theology at Aquinas College. For relaxation she enjoys film, reading, dinner with friends and kayaking.

Today, Sister Mary Kay Oosdyke is supporting pastors and parish staff by providing adult formation and spiritual formation workshops, seminars, and retreats.

2018 – 57 Years a Sister

Prayer Ministry

Pray for economic justice throughout our world

Sister Mary Kay Oosdyke teaching theology at Aquinas College.

Dominican Associates celebrated Sister Mary Kay Oosdyke’s nine year’s of service as Associate Life Director and wished her well on her next ministry path.

Sister Mary Kay welcomed 9 classes of Associates to Dominican spiritual life.

Sister Mary Kay and Dominican Associate Peter Albertini catch up at Dominican Chapel/Marywood.

Sister Mary Kay leads many retreats for Sisters and Associates. She also offers retreats and workshops for parish communities.

In ministry with Sister Mary Kay Oosdyke, OP

St Thomas Aquinas Sculpture Unveiled: A Symbol for All Time


ADVENTure 2019: Giving Thanks & Praise for the Blessings of Friends


Dominican Sisters Day of Service


2019 National SisterStory Project Captures Stories About Sisters by Aquinas College Students