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The George Fox University Summer Theology Institute

The People



Trisha Welstad

Trisha Welstad

Director, Theologia
Executive Director, Institute for Pastoral & Congregational Thriving

Trisha has served as the executive director of The Leadership Center, coaching women and men on vocation and leadership since 2012. Trisha has her doctorate in Leadership and Global Perspectives from Portland Seminary and is an ordained elder in the Free Methodist Church. Trisha directs The Institute for Pastoral and Congregational Thriving at Portland Seminary, is the director for Theologia: George Fox's High School Youth Theology Institute, and serves as project faculty for the doctorate in Leadership and Global Perspectives at Portland Seminary. Trisha’s vision for the world is for all people to activate their unique identity and calling, welcoming one another to play and work together in mutually honorable, hospitable and generous ways that create healthy and sustainable relationships with God, self, others, and the planet.



Hannah Souter

Assistant Director, Theologia

Assistant Director, Institute for Pastoral & Congregational Thriving

Pastor at New Hope Church

Hannah Souter is the Assistant Director for Theologia. She is a graduate of Portland Seminary and attended George Fox University for her undergrad. Hannah also serves as Community and Spiritual Formation Pastor at  New Hope Church in SE Portland. Hanah grew up camping, hiking, and romping around the Pacific Northwest. Not much has changed :)



Gaby Viesca

Gaby was born and raised in Mexico and has been living in Portland for the last several years. She holds a master's degree in Biblical Studies from Regent University and a bachelor's degree in International Business from Universidad de las Americas. Gaby has worked full-time pastoral ministry in Israel, Mexico, and the Pacific Northwest. She is a frequent speaker at churches, conferences, and universities. Outside the work setting, Gaby enjoys traveling the world, exploring the outdoors, dancing to any and every tune, and talking to strangers who quickly become friends.



Ekaputra Tupamahu 

Assistant Professor of the New Testament, Portland Seminary

Director, Seminary Masters Program

Dr. Tupamahu received his Ph.D. from Vanderbilt University in 2019.  He earned a master's degree and an MDiv from Asia Pacific Theological Seminary, and master's degrees from the Claremont School of Theology and Vanderbilt University. Tupamahu has a broad range of academic interests, including the politics of language, race/ethnic theory, postcolonial studies, immigration studies, critical study of religion, and global Christianity (particularly Pentecostal/Charismatic movement). All these interests inform and influence the way he approaches the texts of the New Testament and the history of early Christian movement(s).

Tupamahu formerly worked as a pastor of an Indonesian congregation in Redlands, California, and, from 2014 to 2018, he was a worship pastor at Connection Pointe Church in Nashville, Tennessee. He enjoys hiking, running, and many other outdoor activities with his family. Exploring local foods is what he loves to do when traveling.



Joel Mayward

Assistant Professor of Christian Ministries, Theology & Arts, George Fox University

Joel Mayward (PhD, St Andrews) is Assistant Professor of Christian Ministries, Theology and the Arts at GFU, where he also serves as a Faculty Fellow in the Honors Program. Joel has over 15 years of youth ministry experience, having served as a youth and young adults pastor in churches in Oregon, Arizona, and British Columbia. The author of three church ministry books, Joel is also a professional freelance film critic and the Theology Editor for The Other Journal, an interdisciplinary academic journal of theology and culture.