Adam Co, Lead Pastor (Transitional)

It is truly my joy and privilege to serve as your transitional pastor. Allow me to introduce myself.  My name is Adam Co. My wife is Wensley and my four boys are Aiden, Aldridge, Avery, and  Allister. I am currently a professor of theology at California  Baptist University. But prior to that, I have pastored several churches for over a decade in the Chicago area as well as in southern California. And even earlier than my pastoral years, I practiced law as an attorney in California for a few years.

As a pastor, I am committed to the building-up God’s people through the clear and passionate teaching of God’s Word. So, during my time here at Church on the Hill, I hope to continue the church’s strong commitment to the Word of God and by it grow the congregation and impact the community with the gospel of Jesus Christ.



Karin Mazzeo, Next Gen Pastor

“We will tell the next generation the praiseworthy deeds of the Lord, his power, and the wonders he has done.”  — Psalm 78:4

My name is Karin Mazzeo.  I’m the Next Generation Pastor here at Church on the Hill.  I started here 15 years ago as the Children’s Pastor and have been serving ever since.  I am a transplant from the Chicagoland area who made Southern California home when I and married my husband, Alex.   He and I live in Riverside with our dog, Watson. 

I went to school in Illinois, getting my BA in Sociology and then worked in the social services/ nonprofit arena for several years while volunteering at my local church.  God then called me to vocational ministry and I went to seminary at Dallas Theological Seminary, graduating in 2003 with a MaCE.  I was ordained in 2018.  In 2017, I became the Next Generation Pastor here and now have the opportunity to work with a great staff and awesome volunteers, overseeing our ministry from birth- young adult.  I also get to lead a women’s bible study every Friday. 

When I’m not working, I love music and art, reading books and drinking coffee with friends.

Jesse Silva, Student Ministry Lead

Hi! My name is Jesse Silva and I have the honor of influencing students and our volunteer youth leaders as the Next Gen Student Ministry Lead. I am a product of this youth group, having grown up in  it myself. Over the years, many of the members of this church have become as family to me, and many of the youth as brothers and sisters. I appreciate every single parent who has entrusted me with their teenager, even if it is for only a few hours each week.

While in high school, I was a part of a program that allowed me to receive college units while pursuing my high school diploma. I graduated with my AS in Social and Behavioral Studies from Moreno Valley College in 2015. I attended Azusa Pacific University for three years and acquired my BA in Youth Ministry. I am currently pursuing my Master of Divinity from Azusa Pacific Seminary, aiming to complete it by Spring of 2021. Feel free to reach out to me if you ever have any questions!

Dwayne Morris, Children's Lead


Connie Seinturier, Administrator

Tina Castro, Administrative Assistant

Jeninne Hell, Bookkeeper


Lucas Pimentel, Contemporary Worship Leader

Kate Prosser, Contemporary Worship Singer

Timothy Buensuceso, Traditional Worship Leader

Doug Nasluchacz, Volunteer Worship Lead


Harvey Rustman, Volunteer Technical Director

Frank Seinturier, Volunteer Sound Engineer


Heather Young, Preschool Director

Lynn Ricards, Assistant Preschool Director


Paul Lovan, Facility Custodian