Tim Park
Lead Pastor
timp@efreedb.org

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.

Kevin Ahn
Associate Pastor of NextGen
kevina@efreedb.org

Originally from Orange County, Kevin loves seeing young people grow and wrestle with what it means to follow Jesus. He and his wife Kelly have a son (August) and the best dog in the world (Rocky). Kevin's interests range from LA sports teams, trying new foods, music, and multi-ethnic movements in church history. Kevin earned his B.A. in Biblical Studies from Moody Bible Institute and his M.Div from Trinity Evangelical Divinity School.

Tim Callahan
Youth Director
timc@efreedb.org

Tim grew up in the Bay Area in 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 him to work with the Youth Ministry. "Working with youth students is exciting because it is one of the most pivotal times in a person's life." Tim is married to his beautiful wife, Alexis, and they have a daughter, Aria. Some of Tim’s hobbies include traveling, following sports, exploring the outdoors, and finding new coffee shops.

Jim Wes
Director of Shepherding Ministries
jimw@efreedb.org

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.

Linda Merrill
Shepherding Ministries Assistant
lindamer@efreedb.org

Linda is a Southern California native who moved to Diamond Bar in 1982. She is the mother of 3 and Grandma of 7 and loves spending time with her family. Since coming to EFree in 2007, Linda has been an active participant in our Children's Ministry and joined our staff in 2017 as Children's Ministry Assistant. In 2024, she began serving as our Shepherding Ministries Assistant. Linda is excited about combining her background in customer service and business administration with her love for the Lord and His people to serve our family here at EFree and our community.

Eddie Lee
Worship Arts Director
eddiel@efreedb.org

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
mikes@efreedb.org

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.

Mona Hwang
Finance Manager
monah@efreedb.org

Mona was born in Pittsburgh, Pennsylvania and moved to Southern California during elementary school. She graduated with a B.A. in Mathematics from UC Berkeley (Go Bears!). She is married to David, and has three children, Elizabeth, Joseph and Alexander. Mona is passionate about sharing and showing God’s love with family, friends and community and feels blessed to use her background in finance to oversee EFree’s finances. Mona also serves in the Children’s Ministry teaching the 4th and 5th graders.

Gail Laurie
Adminstrative Assistant
gaill@efreedb.org

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
elainey@efreedb.org

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
markh@efreedb.org

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.