Our staff and board utilize their individual expertise, skills, and passions to further our organizational mission.


Pursuing Missional Impact

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Advising Strategic Direction

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Exploring New Opportunities

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Michael Gulker

Rev. Michael Gulker: President

Since 2011, Michael has been leading The Colossian Forum in building strategic partnerships and providing organizational direction.

A native of West Michigan, Michael studied philosophy and theology at Calvin College, has a divinity degree from Duke Divinity School, and is an ordained Mennonite pastor. Before joining The Colossian Forum, he served as pastor of Christ Community Church in Des Moines, Iowa. Michael and his wife, Jodie, have two children.

Tanner Smith

Rev. Dr. Tanner Smith: Chief of Staff

Tanner manages our strategic initiatives and internal processes to help move our transformative mission from theory to reality.

Tanner loves to co-create healthy cultures where team members experience fulfillment, belonging, and accomplishment. Tanner completed his doctorate in Mission and Leadership in 2016 from Luther Seminary and is an ordained minister in The Reformed Church in America. Tanner spends as much time as possible outdoors with his wife and 3 children.

Jess Shults

Rev. Jess Shults: Chief Partnerships Officer

Jess leads and executes our program deployment ensuring we understand and exceed our partners’ expectations and needs.

Jess is ordained in the Reformed Church in America and earned her M.Div. from Western Theological Seminary and Bachelor of Arts from Northwestern College. She previously served for 18 years as a pastor at Standale Reformed Church. When not working, you can find Jess and her husband cheering on their two boys at their sporting events.

Stacey Wieland

Dr. Stacey Wieland: Vice President of Programming, Research, and Evaluation

Stacey develops and evaluates the practices underpinning our conflict transformation programs and crafts components of our resource ecosystem.

Stacey earned her PhD from the University of Colorado, Boulder. A specialist in organizational communication, her qualitative research focuses on identity, culture, and discourse. Stacey has published in journals such as Communication Monographs, Management Communication Quarterly, Communication Theory, and The Journal of Applied Communication Research.

Andy Saur

Andy Saur: Vice President of Operations

Andy makes everyone’s life easier by providing administrative support to the President and overseeing many of the organization’s systems.

Andy has a bachelor’s degree in communications from Wheaton College and completed a diploma in Entertainment Business Management from Vancouver Film School. In his spare time, he seeks sunshine and a city bench to create art of his own in the form of poetry.

Sarah Johnson: Vice President of Marketing and Communications

Sarah shares the story of good work happening at The Colossian Forum by leading an intentional vision and championing compelling messages.

Before joining The Colossian Forum, Sarah worked in a human-centered design lab and led marketing teams in Christian higher education and educational publishing. Outside of work, you can find Sarah hosting book clubs and camping across the country with her husband and four children.

Ashlee Eiland

Ashlee Eiland: Vice President of Partnerships

Ashlee identifies and executes strategic connections between The Colossian Forum’s programs and our valuable partners.

Before joining The Colossian Forum, Ashlee led in vocational church ministry for 13 years, as well as in Corporate Human Resources at Nestlé USA. She earned her Master of Arts in organizational leadership from Judson University and Bachelor of Arts in international relations—with a minor in managing human relations—from the University of Southern California. In her free time, Ashlee enjoys traveling, writing, baking, and spending quality time with her husband and their three kids.

Matt Postma

Rev. Matt Postma: Director of Partnerships

Matt invites individuals and organizational partners into deeper connections with The Colossian Forum’s mission and maintains deep connections with our partners.

Previously, Matt worked as a pastor at Calvin University and with InterVarsity at Grand Valley State University. He earned his M.Div. from Calvin Theological Seminary and a Bachelor of Arts from Dordt College. When he’s not working, you can find Matt roasting coffee, learning more about fly fishing, or enjoying time with his family.

Gabbie Tiesma: Administrative Assistant

Gabbie contributes to a wide range of functions within the organization, providing administrative support to the programming, sales, and deployment teams.

Gabbie earned her MA in Human Services Counseling – Business from Liberty University and has experiences in human services and elementary education. Outside of work, you can find her enjoying a cup of coffee on her front porch, scouring the local thrift stores for hidden gems, or sharing a meal with family and friends.

Maddie Vonk: Marketing and Communications Manager

Maddie, through writing and storytelling on social platforms and other creative mediums, welcomes people to learn from and engage The Colossian Forum’s teachings.

Maddie holds a B.A. in English Literature from Wheaton College (IL) and an MDiv. from Western Theological Seminary (MI). In her free time, she can be found reading by the lake, sipping an iced mocha at a local coffee shop, or watching a favorite TV show with a friend.



Board Chair Gene Miyamoto

Gene Miyamoto: Chair

Gene serves as a principal advisor and CEO of a healthcare service private consultancy and is based in Holland, MI.

Gene has led and served in health system C-Suite and Board roles for 40 years, including (to name a few): Spectrum Health (now Corewell Health), Priority Health, Trinity Health, and Ascension Health. Gene has a B.A. from Calvin University in Philosophy and a M.H.S.A from the University of Michigan.

Board Member Juli Morse

Juli Morse: Vice Chair

Juli serves as Vice President of Customer Success at Swan Island Networks in Portland, OR.

Juli is a mechanical engineer, entrepreneur, and founder of River Parkway Labs, with 17 years of experience working in the high tech and consumer goods industries. She graduated from George Fox University with a B.S. in Engineering and holds B.S. and M.S. degrees in Mechanical Engineering from Washington University in St. Louis.

Board Member Kristi Potter

Kristi Potter: Secretary

Kristi most recently served as director of the January Series at Calvin University in Grand Rapids, MI.

Kristi served as part of the January Series staff at Calvin University (Grand Rapids, MI) from 1996 to 2022, acting as the Series’ Director for 15 years. She is a graduate of Calvin University and has served as an elder at Calvary Christian Reformed Church (Wyoming, MI).

Adam Kinder: Treasurer

Adam serves as the Chief Financial Officer for Holland Home and Christian Living Services in Grand Rapids, MI.

Adam has served in executive leadership roles within a variety of corporate finance teams for more than 10 years, including leading the corporate finance team of a publicly-traded corporation. He is a graduate of Calvin University with a B.S. in Accountancy and is a Certified Public Accountant and Chartered Global Management Accountant.

Mycal Brickhouse: Director

Mycal serves as the Senior Pastor of Cary First Christian Church (Cary, NC) and the Managing Director of Grants at Leadership Education at Duke Divinity School (Durham, NC).

Mycal earned a BA in Political Science and a BA in African American Studies from The University of North Carolina at Chapel Hill as well as a MDiv from Duke Divinity School. Mycal is an active volunteer in the community and currently serves as a member of the Cary Coalition of Wake County Habitat for Humanity, and the Chairperson of the Western Regional Community Advisory Committee of Wake County Human Services.

Patricia Duthler: Director

Patricia serves as the Managing Investor and CEO at Duthler Holdings, LLC.

Patricia has served as the Executive Director of GROW (Grand Rapids Opportunities for Women) and as a senior consultant with Greystone Global of Chicago. She graduated with a BA in secondary education from Calvin College and a BS in international business from Aquinas College. She has also earned a Master of Public Administration from Western Michigan University and a Master Certificate in Applied Project Management from Villanova University.

Board Member Christine Metzger

Christine Metzger: Director

Christine is the Head of School at Lexington Christian Academy (Lexington, MA).

Christine earned her B.A. in Education from Calvin College, an M.Ed. in Educational Administration and Supervision from Covenant College and was a fellow in the inaugural cohort of the VanLunen Center for Executive Management. The majority of Christine’s nearly 30-year career centers in senior leadership experience in non-profits, managing organizations of 40–80 people and budgets of $2M to $10M.

Tru Pettigrew: Director

Tru is the founder/owner of Tru Access and is the first Chief Diversity and Inclusion Officer at the Minnesota Timberwolves.

Tru is a celebrated author, an engaging speaker, a committed community leader, and an award-winning marketing executive with close to 20 years of experience at the nation’s top advertising & marketing agencies. He founded Tru Access to help individuals and organizations bridge gaps across areas that cause division, dysfunction, and separation.

Perrin Rynders: Director

Perrin is a trial attorney and partner at Varnum Law in Grand Rapids, MI.

Perrin has served with Varnum Law since 1985 where he has successfully prosecuted and defended a wide variety of business and commercial disputes, ERISA cases, employment cases, product liability and personal injury cases, health care fraud and tax matters. He earned his J.D. from University of Michigan Law School and his B.A. in History from Calvin University.



We are grateful for your interest in the work of our organization and invite you to prayerfully consider applying for an open position that would uniquely fit your skills and passions.

Rooting Ourselves in the Gospel

The Colossian Forum team is made up of dedicated Christians who seek to bring the reconciliation of Christ to a divided society. We orient ourselves through prayerful encounters with God, starting each day with a shared time of Scripture reading as well as liturgical and intercessory prayers.

Embracing Conflict as Opportunity

We don’t just teach others to engage conflict, we implement practices of Christian conflict transformation in our daily organizational rhythms. From staff meetings to one-on-one conversations, we embrace our differences and navigate our disagreements by following our North Star: love of God and love of neighbor.

Maintaining a Culture of Excellence

We believe in working to the best of our ability, whether leaning into conflict or laying the groundwork behind the scenes. We “work with all (our) heart, as working for the Lord, not for people,” because we hold that God has invited us into our tasks, as he seeks to reconcile those within his Church to one another and to himself.

Caring Deeply for One Another

Our staff leans into life together. We share one another’s burdens and celebrate individual achievements. We genuinely care for one another and actively enjoy spending our time together. We structure our work time to leave intentional opportunities to connect as humans, not just colleagues to better understand and grow with one another.