senior Pastor

Pastor Robb has been a part of Grace Church since childhood, where his father, Bob Yandian, served as pastor of Grace for 33 years. After graduating high school, he attended the University of Oklahoma, where he earned a degree in philosophy. One week after graduating college, in May 1996, he married Kellie, the love of his life. They have three children: Alex, Nathan, and Rachel. Pastor Robb began working at Grace in 1997 as a teacher at Grace Christian School. Since then, he has worked in maintenance, custodial, student ministry, missions, and outreach. He became Senior Pastor in May of 2013. Pastor Robb is passionate about reaching people far from God with the hope of the gospel of Jesus, and helping followers of Jesus walk more closely with Him.

Connect with Pastor Robb on Instagram or facebook

Read Kellie's hope


Associate Pastor

Geoff was saved in 1996 and in October of the same year he married his lovely wife, Lisa. Together, they have three children: Asia, Elijah, and Zoe. Pastor Geoff is a graduate from the Virginia Military Institute, where he earned a degree in history and was commissioned as an officer in the U.S. Army. He left the Army as a Captain, and then worked in the pharmaceutical industry for fourteen years holding various positions in sales, training, and management. He has served in multiple areas of the church including the nursery, serving communion, as a Small Groups leader, a board member, and in outreach.  He became Associate Pastor in July 2014. Geoff is excited about the vision of the church that God has given Pastor Robb, and is on fire for reaching people for Jesus Christ to the glory of God.

Connect with Geoff on Instagram 

Nick tiffee

Worship Director

Nick joined his first worship team in 2006 which is when the Lord began creating a deep passion in him for pure, intimate worship and leading others into an atmosphere where they can experience the power and presence of God. Nick loves cultivating musicians, singers, songwriters, and worship leaders on a natural and spiritual level. Nick attended Victory Bible College in Tulsa, Oklahoma and has served in both student and worship ministry within the local church.

As Worship Director, Nick’s goal is to provide a place where the Lord can minister to each person that attends our services in a tangible, authentic, and impactful way.

One of Nick's many passions is missions and he has been on several trips ministering in the states and overseas, seeing God’s power displayed on every trip. His hobbies include hunting, fishing, and collecting every kind of video game. 

Nick married his dream girl, Charity, in 2018! Charity is actively involved in the Worship Team and is the worship leader in our student ministry.

connect with Nick on Instagram or facebook

Grant Jacobs

Next Generation + Small groups pastor

Cassie Jacobs

Creative Director

Grant and Cassie believe there are only a couple important things in life. And while enjoying the outdoors and drinking black coffee is admirable, serving the local church tops the list. Married in 2007, they have served in multiple areas of the church together.

Grant flew in corporate aviation for almost 10 years and was just getting the hang of it when he transitioned to full time ministry. He enjoys never going inside, reading and spending time with his wife and friends. Although Grant isn't known for his multitasking skills he oversees both the Next Generation ministries and Small Groups. His passion for our Next Generation ministries is that these formative years become the foundation for a lifelong love of Christ and His Church. And Grant believes life is more fun and fulfilling when done with others so you are cheating yourself if you aren't apart of a Small Group.

Cassie followed the typical creative career track by working as a barista in multiple locally owned coffee shops and coloring her hair before Katy Perry made it cool. She loves to laugh with people and when she has a few spare hours she'll nap or binge watch Gilmore Girls. If you’re not entirely sure what a Creative Director does, neither are we. However, Cassie’s primary responsibility is planning our services and she oversees our website and social media as well as our worship, production, visual design, events, and coffee shop teams. Cassie is passionate about creating environments where people feel at home, have fun, and find it easy to meet God.

Both Grant and Cassie were homeschooled so speak slowly and use small words around them.

Connect with Grant on Instagram

Connect with Cassie on Instagram

Tracie Pritchett

Kids Pastor [Littles]

Tracie moved to Tulsa from Montana in 2007 and married her wonderful husband, Jeff in 2008. Together, Jeff and Tracie have 4 children: Cory, Trent, Rachel and Morgan. She has served in several areas of the church but her greatest passion has been found in teaching the littles in kids’ ministry. Tracie became the Littles' Pastor in 2018 and her desire is to create a fun, safe, loving place for babies and preschoolers to attend weekly, to teach them about how much God loves them, and plant God’s word in their hearts at a young age. Tracie also loves food (especially cheesecake!) and her family all together for Sunday dinners. She is excited for God’s plans for the future!

Connect with Tracie on Instagram



As a child, while attending summer camp, God began to develop a passion in Josh’s heart to help in the ministry and teach kids the Word of God. Today, Josh’s mission is to teach every child he can to know who they truly are in Christ and to provide a safe, fun place for them to do just that!

 Josh has been a part of the church since he was 8 years old and graduated high school in 2015 from Lincoln Christian in Tulsa, OK. He has been active on the worship teams at the church as well as in our kids and student ministries. He loves being able to invest into kid’s lives just as he was invested in when he was growing up.

In 2017, he married his beautiful wife, Christina. Christina is the worship leader in our kids’ ministry and is also heavily involved with the student ministry.


Jeremy Butler

Facility Operations

Robin Branham

Finance Director

Geof Jackson

Ministries Director

Willie Knox

Facility Operations Director

Brandon Reed

A/V Engineer

Mallori Reed

Visual Design

Barbi Sterrenberg

Pastoral Care/Administrative Assistant

Beth Wasson

Executive Administrative Assistant

Advisory Board

 Dirk + Roxann Hertzog

Dirk + Roxann Hertzog

 James + Randa Livingston

James + Randa Livingston

 Robert + Jackie Pryor

Robert + Jackie Pryor

 Larry + Carol Wilson

Larry + Carol Wilson

 Mark + Kristin Tedford

Mark + Kristin Tedford