Leadership Team


Rev. Dr. Rob Weingartner

Executive Director

Rob Weingartner was called as Executive Director in 2002 following pastorates in Indiana and Ohio. A graduate of Pittsburgh (M.Div.) and Princeton (D.Min.) seminaries, he served as a member of the General Assembly Council and the Worldwide Ministries Division committee. Rob has also served on the boards of Pittsburgh Theological Seminary, Presbyterians for Renewal, New Wilmington Mission Conference and Presbyterian Global Fellowship.


Linda Patrick

Chief Financial Officer

Linda Patrick joined our staff in 1996 after a career as a partner in an international accounting firm. She serves The Outreach Foundation as Chief Financial Officer and is a Certified Public Accountant. Linda is a Ruling Elder and member of First Presbyterian Church, Franklin, TN. She is also a trustee of the Board of Pensions. 


Marilyn Borst

Associate Director for Partnership Development

Marilyn Borst is Associate Director for Partnership Development. She works with churches around the United States to help them discern God’s call to global engagement while connecting them to that work alongside the Global Church in Africa, Latin America and the Caribbean, Asia and the Middle East – a particular area of specialty for her. She travels extensively, nurturing relationships with church leaders, assessing ministry initiatives and leading short-term vision teams. Just within the past five years, her journeys have taken her to Lebanon, Syria, Iraq, Egypt, Oman, Israel/Palestine, Cuba, Pakistan, Russia, Mozambique, Kenya, Rwanda and Malawi. Prior to joining The Outreach Foundation staff, Marilyn served for over six years as Director of Global Ministry at Peachtree Presbyterian Church in Atlanta, where she oversaw the international partnerships of the PC(USA)’s largest congregation in over 33 countries. Marilyn holds a B.A. in Classical Studies from Calvin College (Grand Rapids, MI), an M.A. in Art History from Michigan State University, and an M.A. in Theology from St. Thomas University in Houston. She has participated in four archaeological digs in Jordan and Egypt and taught as adjunct faculty at the University of Houston for 20 years. She is an elder at North Avenue Presbyterian in Atlanta.


Rev. Dr. Mark Mueller

Director of Development

Rev. Dr. Mark Mueller serves The Outreach Foundation as Director of Development. After working for ten years as a teacher and school administrator, Mark heard God’s call to pastoral ministry, and he served congregations for twenty-three years. Mark earned a M.Ed. at BYU, M.Div. at Louisville Theological Seminary and a D.Min. at Columbia Theological Seminary with an emphasis on Evangelism and New Church Development. Mark and his wife, the Rev. Dr. Toby Mueller, have two married daughters and one grandson.


Rev. Juan J. Sarmiento

Associate Director for Mission

Juan resources congregations in their missional renewal and builds networks for participation in God’s mission. He served as Evangelism Catalyst at the Presbyterian Mission Agency and U.S. Director of PM Internacional, an organization that ministers holistically in several Muslim majority countries. Juan has been a pastor in English, Portuguese and Spanish speaking congregations and very active as a trainer and speaker in the areas of church planting, leadership development and cross cultural outreach. His formal education for ministry includes Columbia, Louisville, San Francisco and Fuller Theological Seminaries. He is a member of the American Society of Missiology.