Sr. Geraldine Whelan, MSBT

Sr. Geraldine Whelan is a MSBT originally from New Jersey. Sister has guided the center for the past nine years after assignments in Alabama, etc. Sr Gerry continues to work with the lay staff at the Spirituality Center to incorporate the charism in our daily work. She plans and offers retreat programs and uses her creative gifts to make the center beautiful. Sr. Gerry is also available to meet with people for Spiritual Direction. She can be reached at 267.350.1830


Sr. Sara Butler, MSBT

Sister Sara Butler, M.S.B.T., S.T.L., Ph.D., is professor emerita of dogmatic theology at the University of St. Mary of the Lake, Mundelein, IL, and past president of the Academy for Catholic Theology. She served two terms on the Vatican’s International Theological Commission, was a consultant to the U.S. Bishops’ Doctrine Committee for 14 years, and is currently a consultant to the Pontifical Council for Promoting the New Evangelization. Sr. Sara has represented the Church in national and international ecumenical dialogues, and has devoted her research to questions it addresses: the ordination of women, sacraments, ecclesiology, Christology, and Mariology. She taught seminarians for 24 years—at Mundelein Seminary (Chicago) and St. Joseph’s Seminary (New York)—and has published over 60 scholarly articles and The Catholic Priesthood and Women: A Guide to the Teaching of the Church (Chicago: Hillenbrand, 2007). Sr. Sara is currently director for the New Evangelization at the Mother Boniface Spirituality Center and adjunct professor at St. Charles Borromeo Seminary. She spends two to three weeks each semester at Mundelein Seminary. Sr. Sara may be reached via phone at 267-350-1833

Lay Staff

Our Staff

Joanne Nesbitt has been a lay employee of the MSBT for over twenty years in various roles and is the administrative assistant for the Center. Joanne serves as the Retreat Coordinator organizing the event logistics and handling contracts, payments and invoicing. Joanne and her family live in NE Philadelphia. Joanne can be reached at 267.350.1831 or

Laura Endara-Mantilla, MA, Director of Hispanic Ministry, was born in Colombia and raised in Ecuador before moving to the United States. She received a Bachelor’s Degree in Business Management and Marketing from Wharton School University of Pennsylvania and a Master’s Degree in Theology from Boston College. She has been working with the Hispanic community for over 10 years, and she teaches Theology for the Hispanic Ministry at the Archdiocese of Philadelphia. She directs retreats, provides talks, offers Bible Studies, facilitates youth, young adult, & family events, and leads mornings reflections. She has been married for over 30 years and has four children and three grandchildren.