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Tim Park 
Lead Pastor

Tim grew up in Orange County and received his B.A. in Sociology from UCLA (go Bruins!) and his Master of Divinity from Talbot School of Theology. Tim is passionate about seeing people’s lives transformed by the Gospel. Tim and his wife, JoAnn, have two children, Andrew and Amanda. Tim enjoys finding new places to eat and running marathons.


Luke Pamplin
Associate Pastor

Luke Pamplin was born in Southern California and grew up in West Covina and Diamond Bar. He earned his B.A. in Biblical Studies from Biola University and is currently working toward an M.Div. at Talbot School of Theology. Luke started attending EFree Diamond Bar in December 2008, where he was closely mentored by their pastoral staff for three years. His first staff role was as the Children's Ministry Intern. Luke is passionate about getting people connected to Jesus and the Church to see their faith grow. If you visit him at home, you might find him working in his vegetable garden.



Kevin Ahn
Youth Pastor

Kevin was born and raised in Orange County, CA. He lived in Chicago, IL for 8 years where he served in a variety of youth ministry contexts, received his B.A. in Biblical Studies from Moody Bible Institute and M. Div from Trinity Evangelical Divinity School, but most importantly he met and married his wife Kelly. In his free time Kevin enjoys watching the Dodgers and Lakers, practicing Brazilian JiuJitsu, and finding new food recipes on YouTube. But his ultimate passion is youth ministry where he gets to pour into the next generation of the church and see students wrestle with and understand the Gospel.

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Christian Clark
Children's Ministry Director

Christian was born and raised in Southern California. After graduating from a local Christian high school, he moved to Joplin, Missouri to attend Ozark Christian College where he graduated with a bachelor of theology of the New Testament and a bachelor of preaching. Christian has a passion for children to know and love God.


Kristin Neal
Director of Community Outreach

Kristin grew up in the Diamond Bar area. She is married to an amazing husband, Steve, and they have three great kids. She was baptized here at EFree and joined our staff in 2017. Kristin is passionate about sharing the Gospel of Jesus Christ to our community. 


Tim Callahan
Junior High Director

Tim grew up in the Bay Area with a large family before moving to Diamond Bar for college. After moving he got connected to Efree and soon became the Children's ministry intern. He then felt God calling me to work with the Jr. High ministry. 

"Working with Jr. High students is exciting because it is one of the most pivotal times in a persons life." 

While living in Southern California, he met and married his beautiful wife Alexis. 
His hobbies include, traveling, following sports, exploring the outdoors and finding new coffee shops. 

Jim Wes 
Director of Shepherding Ministries

Jim was born in Philadelphia and moved to San Diego for Jr High. He was later trained as an engineer at UC San Diego. While working in Defense R&D and working with church high school students, he met his sweetheart, Cindy. Together, Jim and Cindy raised their four kids at EFree Church and continue to serve in many areas of ministry. They are passionate about connections, worship music, and the church caring for the church. Weekends may find them folk singing or at the pool with their four grandkids.


Eddie Lee 
Worship Arts Director

Eddie was born and raised in Los Angeles and moved to Diamond Bar at the age of 16. He began attending EFree Diamond Bar with his family in 2014 and began serving on the worship team in 2015. Eddie has a passion for music and worship and is honored to be part of the EFree staff in the role of Worship Arts Director. Eddie and his wife, Susy, have four boys, Lennon, Cullen, Madsen and Julian. Eddie loves spending time with his family, enjoys watching movies/television shows, and listening to a variety of music.


Mike Scaccia 
Facilities Manager

Mike is our Mr. Fix-It. With a smile, he makes sure that everything in our facilities is as it should be. Whether it is room setup, repairs, enhancements, maintenance, or IT support for the technologically disinclined, Mike is always there to help. Mike is married to Amy, and has two children: Phoebe and Caden. 


Griselda Chin
Finance Manager

Griselda grew up in what used to be South-Central Los Angeles and was the first in her family and most of her neighborhood to go to college. She graduated from Stanford. She is married to Kelvin, and they have one son, Samuel. Along with overseeing all our finances, Griselda is also passionate about the Dignified Care group for those who have experienced infertility, miscarriages, and still birth--a group was pivotal in forming.


Gail Laurie 
Adminstrative Assistant

Gail was born in Montebello and grew up in Monterey Park, California. After graduating high school, Gail immediately went to work in Los Angeles at Security Pacific Bank in the Security Division. In 1980, she started her own secretarial service called “Surrogate Secretary” and accepted the Head Secretary position from Chevron Oil Field Research Co. in 1982. At EFree, Gail is an administrative assistant insuring a smooth flow of communication from top to bottom. She enjoys seeing God at work in her small group, and Adult Bible Fellowship. In her free time she enjoys traveling, going to the beach and river, and spending time with friends. Gail is married to Stuart and has three adult kids, and two grandchildren. 


Elaine Yee 
Adminstrative Assistant

Elaine is passionate about our church and about bringing excellence to everything we do. She served our church in a number of volunteer opportunities before coming on staff, including serving as our Deaconness of Fellowship. Elaine holds B.S. in Human Resources from California State Polytechnic University, Pomona. She also has a lot of project management experience. Elaine is married to Thomas, and they have three children.


Mark Hopper 
Pastor Emeritus

Pastor Mark Hopper served as the Lead Pastor at EFree Diamond Bar from June 1988 to August 2015. He is a graduate of Dallas Theological Seminary with his Th.M and also holds degrees from Arizona State University and the University of Arizona. If you step foot on our campus, you will without a doubt be greeted with a warm smile and friendly conversation from Pastor Mark. He is gifted with a shepherd’s heart and cares deeply for the needs of our church family. In Mark’s spare time, he enjoys golfing, reading history books and spending time with his family. Along with his wife Jeanne, the Hoppers have four children and seven grandchildren.