Doctor of Leadership Faculty and Team

Lead Mentor

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Jason Swan Clark

Doctor of Leadership in Global Perspectives Lead Mentor

Learn more about Jason.

Special Guest Instructors

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Martyn Percy

Position: Guest lecturer

Academic and Professional Background: Dean of Christ Church, Oxford and past Principal of Ripon College Cuddesdon and the Oxford Ministry Course; Professor of Theological Education at King’s College London; Honorary Canon of Salisbury Cathedral and Canon Theologian of Sheffield Cathedral; he has served as a Director the Advertising Standards Authority and currently serves as Independent Adjudicator for the Portman Group and as a Commissioner for the Direct Marketing Authority. His recent books include:

  • The Ecclesial Canopy: Faith, Hope, Charity (2012)
  • Anglicanism: Confidence, Commitment and Communion (2013)
  • The Future Shapes of Anglicanism: Charts, Currents, Contours (2017)
  • Untamed Gospel: Poems, Prose and Protests (2017)
  • Clergy, Culture and Ministry The Dynamics of Roles and Relations in Church and Society (2017)
  • Reasonable Radical?: Reading the Writings of Martyn Percy (2018)


Phone: +44-1865 276150

Project Faculty

At the beginning of the program, Project Faculty are paired with their advisees to provide them with individual guidance and coaching. They help their advisees develop and focus their areas of specialization within the project portfolio research sequence.

Seminary faculty routinely serve as Project Faculty within the doctoral programs. See Portland Seminary faculty page for details.

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Clifford Berger

Position: Associate Director, Doctoral Programs

Learn more about Clifford.

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Holley Clough

Position: Project Faculty (Portland Seminary); Adjunct Faculty of Bible and Ministry Practicums, Coaching and Seminary Graduate Courses at The King’s University; Fernwood Adult Education Practice, Principal, Implementing Director Emeritus, Multnomah University Adult Degree Completion Program. 

Current Board Activity: World Team, Intl., Christian Adult Higher Education Association, Mission ConneXion

Current Mission Activity: Agros International serves the poor in Central America through holistic development. Leader and participant since 2004.

Academic and Professional Background: BA, Management and Organizational Leadership, George Fox University; MA, Pastoral Care and Life Coaching, Western Seminary; DMin,Teaching and Writing (Hornecker Award, Dissertation), Gateway Seminary; International Coach Federation, Professional Coach Certification (PCC Level).

Expertise and Research InterestsAdult higher education and life learning, pastoral ministry and leadership development, life coaching, holistic cross-cultural development, leisure and educational travel.,

Office: 503-720-5599

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Aaron Friesen

Position: Project Faculty; Associate Pastor, CitySalt Church in Eugene, OR; Executive Director of Storyline Kids

Academic and Professional Background: BS, Pastoral Studies, Eugene Bible College; MDiv, Fuller Theological Seminary; Ph.D., University of Wales.

Expertise and Research InterestsHistory of Holiness-Pentecostal movements in America; child theology; global Pentecostalism; Pentecostal theology; Luke-Acts


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Kristin Hamilton

Position: Project Faculty

Academic Background: DMin in Leadership and Global Perspectives, PDX Seminary; MDiv from George Fox Evangelical Seminary; Master of Religion in Spiritual Formation from Northwest Nazarene University; BS In Ministry and Theology from Warner Southern University

Expertise and Research Interests: Complicity of the White Evangelical Church in Racism and other Systems of Oppression, Lament and Mourning, Egalitarian Relationships in Marriage and Church Leadership, Spiritual Formation

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Garfield Harvey

Position: Project Faculty

Academic and Professional Background:

AA/AS Degrees in Social & Behavioral Science, Business Management, Sociology, and CSU General Education from Contra Costa College; Master of Religious Education and MAR: Worship Studies from Liberty University; MA Ministerial Leadership, Southeastern University; DMin in Leadership and Global Perspectives, Portland Seminary.

He also has three national designations from the Insurance Institute of America (AINS, API, AIS). In addition, Garfield has more than 20 years of experience planting churches internationally (20 churches) and serves as Lead Pastor for Livingwater Church in Berkeley, CA.

Expertise and Research Interest: Global leadership, cultural intelligence, cross-cultural worship, church planting, intercultural ministries, missions, cultural adaptation, and strategic analysis.



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Rebecca Jeong

Position: Project Faculty, Assistant Professor of Pastoral Theology

Learn more about Rebecca.

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Aaron Peterson

Position: Project Faculty, Founding & Lead Pastor of The Hub Vineyard Church, U.S. Partnership Leader with Uganda

Educational Background: DMin Portland Seminary; MAT, Fuller Seminary; California Clear CLAD Teaching Credential; BA History Cal State University, Northridge High School Educator and Coordinator for LAUSD

Expertise and Research Interests: Education, Pastoring, Life Transformation, Bivocational Ministry, Missions



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Chris Roush

Position: Project Faculty; Ordained Minister and Pastor (American Baptist Churches USA), Associate Director Discipleship, American Baptist Home Mission Societies 

Academic and Professional Background: BA in Social Science Ed; MA in History: SUNY Oneonta; DMin Leadership in the Emerging Culture, Portland Seminary. Chris has over 30 years of ministry experience, serving the local church (Administrative Pastor, Pastor), denominational (Associate Executive Minister, Director of Camping, Associate Director Discipleship), and Specialized Ministry (COO Rainbow Acres - a community for adults with developmental disabilities). A writer, she authored a small group stewardship study - Swimming Upstream: Reflections on Consumerism and Culture.

Expertise and Research Interests: Leadership, emerging leaders, team building, discipleship and evangelism, consumerism and stewardship, alternative ministry models in post-Christian society.


Photo of Karen Tremper

Karen Tremper

Position: Project Faculty

Academic and Professional Background: BA Home Economics, Fresno State University; MA Theology, Fuller Theological Seminary; PhD Intercultural Studies with an emphasis in Leadership, Fuller Theological Seminary. Wycliffe Bible Translator/Summer Institute of Linguistics--Eastern Keres Pueblo Indians translation project; Youth With A Mission--Discipleship Training School Director Harpenden, UK; Professor Biblical Studies and Intercultural Studies at Life Pacific College; Director of Global Life; Intercultural Development Inventory (IDI) Qualified Administrator; ordained minister, Foursquare Church.

Expertise and Research Interests: Women in Leadership, Leadership Training of Emerging Adults, Cultural Competency, Team Training for Cross-Cultural Experiential Learning, Briefing, Debriefing and Re-Entry for Cross-Cultural Experiences, Inclusion of Underrepresented Students in HSI colleges and universities, and Leadership development of Intercultural Teams.


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Trisha Welstad

Position: Project Faculty

Academic and Professional Background: BS, Christian Ministry, Corban University; Mdiv, Azusa Pacific University; DMin, Leadership and Global Perspectives, Portland Seminary of George Fox University. Trisha has more than twenty years of ministry experience (Youth Pastor, Church Planter, Leadership Development Pastor), denominational work (Leadership Development Director), and ten years as the Executive Director of The Leadership Center, LLC.  

Expertise and Research Interests: Leadership; vocation and calling; women in leadership; diversity, equity and inclusion; Wesleyan theology and practice.


Learn more about Trisha.

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Diane Zemke

Position: Project Faculty; Consultant

Academic and Professional Background: BS, Bacteriology and Public Health, WSU; Informal Certificate, Technical Writing, Eastern WSU; MA, Religious Studies, Gonzaga; PhD, Leadership Studies, Gonzaga. Previously employed as a youth and education director for a church, a college philosophy instructor, a university federal grant writer, and freelance writer/editor. Currently consults on issues related to congregational health and decline, primarily for the Lutheran Church, Missouri Synod. Author of Being Smart about Congregational Change.

Expertise and Research Interests: Congregational decline; congregational change; change agents; dissent; decision-making; Christian spirituality; teamwork and small group dynamics; pedagogy.


Doctor of Leadership Faculty and Team

The Seminary Doctoral Team manages the program online platforms, organizes the Advances, and provides support to students and Project Faculty, in-person or online. In short, this team is the 'glue' that holds the various elements of the program together.

Loren Kerns

Director, Doctoral Programs

Clifford Berger

Associate Director, Doctoral Programs

Jen Macnab

Jen Macnab, MPA

Assistant Director of Academic Engagement, Doctoral Programs

Heather Rainey

Program and Operations Coordinator, Doctoral Programs