Meet the Team
Oasis City Church Staff Members
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
Campus Pastor / 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 eight years, they met Bill and Lynne Themelaras. With the guidance of Holy Spirit, the four of them were called to Westerville, OH 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.
Tammy Botkin
Executive Pastor
Tammy Botkin and her husband Brian reside in Delaware, along with their two children. With 25 years of experience in worship leading, pastoring, and discipling, Tammy has spent decades pointing people toward God and nurturing worship environments where He is genuinely pursued. A lifelong creative, Tammy has spent more than 20 years as a musician, songwriter, and recording/performing artist and focused community worship efforts in her work at the Worship Arts Center of Columbus.
Deeply committed to community, Tammy has spent years connecting worship leaders and ministries across the city, believing that collaboration multiplies Kingdom impact. Her 10 years as a consultant have allowed her to work with countless leaders and teams, helping them push beyond surface-level ministry and embrace intentional, sustainable growth.
Tammy leans on her background in operations management and sales, where she developed strengths in staff training and HR, organizational systems, quality assurance, and long-term team health. She loves seeing people thrive in roles aligned with their skills—and watching ministries function and honor the Lord with joy, unity, and excellence.
You will most likely find Tammy with an iced tea in hand and discussing her love of donuts and bluegrass music.
Jake & Pam Lozano
Associate Pastor | Prayer & Prophetic 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, OH. They met at a church conference at the Indiana University of Pennsylvania and began dating shortly after. Jake soon relocated to Cleveland, OH 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 the 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.
Contact a Staff Member
Arthur Green
Youth Pastor
Caeilen Whatley
Youth Director
Rebekah Stupakewicz
Worship Administrator
Alec Ballentine
Children's Pastor
Hope Ballentine
Children's Pastor
Jacqueline Taylor
OC EDU & Discipleship Director
Donnell Phillips
Music & Audio Director
Diondre Norris
Music Director
Linda Lampasone
Financial Administrative Assistant
Kelli Mott
Administrative Assistant
Lynn Metzger
Church Administrator
Elders
- Courtney & Rachel Branch
- Jeremy & Hong Chuah
- Kenston & Terah Henderson
- Barry & Patti Keene
- Matt & Melissa Muir
- Mike & Kathy Silich
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Ben & Tania Stentz
- Mark & Cara Tomallo
- Daryl & Susana Wicker
- Paul & Kristel Sargent
Board of Directors
- Bibie Adesioye
- Jor-El Godsey
- Frank Howse
- Roland Flax
- Adam Stewart
- Bill Themelaras
- Elias Reyes
Deacons
- Lead Deacons: Kenston & Terah Henderson
- Nate & Sonya Collins
- Thomas & Norma Ferguson
- Austin & Mosun Idubor
- Ketti Leff
- Mary Lutz
- Jonathan & Laura Schlesselman
- Dan & Rebekah Stupakewicz
- Jovan & Frances Thomas
- Randall & Anna Woods
