Embracing God | Growing People | Experiencing Revival | Pursuing Reconciliation

About us

Our core values are the underlying principles that guide us in making decisions, determining priorities, setting goals, allocating resources, and carrying our mission to empower disciples and extend God’s kingdom. They are the defining characteristics of Oasis City Church and are drawn from the Bible.

Learn more about Oasis City

Core values

Our core values are the underlying principles that guide us in making decisions, determining priorities, setting goals, allocating resources.

Revival stories

Revival Stories are stories of transformation, a change in the way you think or a moment when God was so present you have to tell people about it. Check out just a few of the many Revival Stories from right here at Oasis City Church. Then consider sharing your own below.

Meet the team

Bill & Lynne Themelaras

Senior Leader / Restore Pastor

Adam & Tara Stewart

Campus Pastor/ Worship & Fine Arts Pastor
Biography picture for Amy Clark.

Amy G Clark

Executive Pastor | Education & Discipleship Director

Jake & Pam Lozano

Associate Pastor / Prayer Pastor

Barry Keene

PrimerTimers Pastor
Hope and Alec Ballentine

Alec & Hope Ballentine

Children’s Pastors

African American Mail against a map wall

Arthur Green

Youth Pastor

Oasis City Church

975 Eastwind Drive, Suite 190, Westerville, OH 43081

Bill & Lynne Themelaras

Senior Leader | Restore Pastor

Bill and Lynne Themelaras were high school sweethearts who married after college and soon began the adventure of full-time ministry. Now, twenty-six years later, they live in Westerville, OH with their three amazing children and the family dog. Bill serves the greater church as a prophetic apostle. He serves as Senior Leader for both Oasis City Church, Westerville, OH and Covenant Church of Pittsburgh, in Pittsburgh, PA.

Bill is gifted as an organizational leader with a heart to raise up team ministry within the church. Bill has a passion for worship, preaching and ministering to people. He enjoys movies, the Pittsburgh Steelers, and is a “foodie”.

Bill also serves as the President of Reconciliation! Ministries International, a network of five-fold ministries participating in the revival, renewal, restoration, and reformation of the church. This network is founded and chaired by Bishop Joseph Garlington, Sr.

Lynne has a Masters Degree in Psychology. She is the Restore Pastor overseeing several ministry areas including Restore, the inner healing ministries of Oasis City Church and Covenant Church of Pittsburgh. She enjoys health and fitness, reading, and Starbucks coffee.

Together Bill and Lynne desire to see lives transformed and to help people embrace their God-created identity.

Adam & Tara Stewart

Worship & Fine Arts Pastor

Adam and Tara’s journey began after Adam’s heart skipped a beat when he first heard Tara sing at the Brownsville Revival School of Ministry in Pensacola, Florida. They married shortly after graduation and began full-time ministry.

While serving as Youth Pastors at Covenant Church of Pittsburgh for 8 years they met Bill and Lynne Themelaras. With the guidance of Holy Spirit the four of them were called to Westerville, Ohio to plant Oasis City Church together.

As the Campus Pastor, Adam loves to lead people in finding their God-given purpose. His passion for leading and mentoring has been a foundational part of his ministry at Oasis City Church.

Tara is a passionate lover of Jesus and prophetic worshiper. She serves as Worship Pastor and loves leading people into authentic encounters with God.

They reside in Galena, OH where you will find Adam with their two boys playing sports, Tara shopping at the Outlet Mall with their daughter or enjoying family time with the newest member of the family, an active bichon named Biggie Smalls.

Biography picture for Amy Clark.

Amy G Clark

Executive Pastor | Education & Discipleship Director

Amy and her husband, Brett are lifelong residents of Westerville Ohio and were middle school sweethearts. They have four grown children and ten grandchildren and recently built their dream home in Johnstown, Ohio to host friends and family.

Amy and her husband love helping people find their forever home and own a successful real estate boutique firm that serves all of central Ohio.

Amy serves as the Executive Pastor of Oasis City Church and is the Education & Discipleship Director. After a radical conversion from atheism to Christianity nearly 40 years ago, Amy has passionately pursued the Word of God and a deep and authentic relationship with Christ that comes through in her ministry. She formerly served as a teaching elder and congregation administrator and has been a guest speaker at various churches across Ohio and at women’s retreats.

Amy enjoys writing and teaching adult education courses and workshops. As the Executive Pastor, she has the opportunity to take an active role in the health and wellness of the organization and leadership.

When not working, you will find Amy and Brett traveling the globe, hanging with their beautiful grandkids, watching Star Trek reruns or out on their boat. Live long and Prosper!

Jake & Pam Lozano

Outreach & Next GEN Pastor | Prayer/Prophetic & Next GEN Pastor

Jake and Pam Lozano grew up in two very different worlds – Jake from the Washington DC/Maryland area and Pam from a small town outside of Cleveland, Ohio. They met at a church conference at the Indiana University of Pennsylvania and began dating shortly after. Jake soon relocated to Cleveland, Ohio where the two of them were married and served together in youth ministry for ten years.

In 2007, God led the Lozano’s to Columbus, OH where they continued to serve youth and young adults for several years. Through a God-ordained transition, God brought Jake and Pam and their three amazing kids to Oasis City Church where they now serve together.

Jake has a passion for evangelism and reaching the lost. He has a passion to help church get “outside the four walls” of the building into the community. In his spare time, Jake enjoys golf, watching sports, playing drums and riding his Vespa.

Pam has a deep desire to encounter God and bring heaven to earth through prayer & intercession. When she isn’t working, she enjoys writing, decorating homes and a Starbucks peppermint hot chocolate with friends.

Together, Jake and Pam desire to see the next generation empowered to passionately know and love Jesus, and for the church to encounter God radically.

New Service Times


This NEW service is a 1-hour, family-friendly, with reduced sound and lighting, and with all the OC essentials of worship, teaching, and ministry – just abbreviated.

Children will worship with their parents, and then go to their rooms for age-focused Bible teaching and ministry.

9:30am & 11:30am

These services will feature everything you already know and love about Sundays at the OC, with all the OC essentials of worship, teaching, and ministry

OC Kids & middle school programing will be available for both services