Tim Osborn, DMin, MDiv

A leader with more than 30 years of ministry experience, Tim Osborn, joined Portland Seminary in 2026 to serve as dean.

He arrived from Western Seminary, where he worked as director of church mission and strategy and as a cohort curator for its master’s degree cohorts for the previous two years. Prior to that, he was the lead pastor at Mosaic Church in Portland for 17 years, where he focused on church planting in the urban core of the city, making disciples for Christ, and developing leaders.

Dr. Osborn also gained pastoral experience as the associate pastor for adult ministries and as a teaching pastor for young adults at Lake Avenue Church in Pasadena, California (1999-2007), and as director of college ministries in the church he grew up in, Arbor Road Church (formerly First Baptist Church of Lakewood) in Long Beach, California (1996-99).

On the educational front, he's taught classes as an adjunct faculty member at Multnomah Seminary/Jessup University. He also cofounded and led the Portland Metro Network, a church-planting ministry, and is a leadership team member of MultiplyPDX, a network of leaders providing relationships, resources and partnerships for church multiplication.

He lives in Portland with his wife Abby and sons Ethan, Maxwell and Owen, and attends Missio Community Church, where he has served as interim pastor since 2024. Tim enjoys reading, yard work, paddleboarding and hiking.

Academic Background

Doctor of Ministry (DMin), Fuller Theological Seminary (2013). Dissertation topic: "Church-based Leadership Development"
Master of Divinity (MDiv), Talbot School of Theology, Biola University
Bachelor of Arts (BA), Azusa Pacific University, double major in bibical studies and psychology

Expertise and Research Interests

Holistic leadership development, disciple-making theory and practice, homiletics, church planting and multiplication