Faculty/Staff Directory | IBCS

Meet the People at IBCS

Meet the people who make IBCS what it is. From administrative staff to faculty and residence hall supervisors, we make up the IBCS family.

Nathan M. Mestler, M.Div.
President and Chief Executive Officer, Bible, Theology, Greek
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Pastor Nathan grew up in ministry, first as a pastor’s son in Bernalillo, New Mexico, and then in Nairobi, Kenya, where his family were missionaries. At age 16, he dedicated his life to full-time Christian ministry. He received a B.A. in Bible and Christian Service in 2003 from International Baptist College and Seminary and an M.Div. in 2009 from Calvary Baptist Theological Seminary in Lansdale, Pennsylvania. In 2009, Pastor Nathan and his family returned to Arizona, where he began to work on the staff at International Baptist College and Seminary. He has served as the Dean of Students at IBCS, then as the college pastor at Tri-City Baptist Church. Pastor Nathan also currently serves as the wing chaplain of the 162nd Wing of the Arizona Air National Guard, Tucson, Arizona. He was installed as the president and CEO of IBCS in the spring of 2020 and continues to teach Bible and Biblical languages in both the undergraduate and graduate programs at IBCS. He loves to preach and teach the Word of God, especially to young people.

Larry Ball, D.Pas.Th.
Bible, Theology, Pastoral Studies
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Dr. Larry Ball attended Bob Jones University where he received his B.A. in Bible. Later he attended San Francisco Baptist Theological Seminary where he completed his M.A. He also received his M.Min. and D.Pas.Th. from Bob Jones University. Dr. Ball served as the senior pastor of two churches in California before becoming the general director of International Baptist Missions in 2010.

Jeffrey G. Caupp, M.Div.
Bible, Hermeneutics, Theology, Philosophy, General Education classes
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Pastor Jeff Caupp, under the ministry of Dr. Collins Glenn in Muncie, Indiana, was saved at a young age. Being raised by a Christian mother and a father who came to know the Lord at the age of 48, Jeff values both Christian education and the men and women who lived Godly lives before him. The love for Jesus that they shared led Jeff to earn a Bachelor of Science from Maranatha Baptist University in 1994 and a Master of Divinity from Calvary Baptist Theological Seminary in 1999. In 2006, after six years of working at Abbott Labs in North Chicago, Illinois, Jeff and his family, Lisa, Acadia, Clayton, and Jeffrey Paul, came to Arizona. Since that time, Jeff has had the privilege of serving as a professor, academic dean, graduate school administrator, and the dean of students at International Baptist College and Seminary.

Peter Davis, Ph.D.
Bible and Church Music Department Head, Music, Piano lessons
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Dr. Peter Davis grew up in the Reorganized Latter Day Saint Church in Iowa. At 16 he began to read the Bible and was saved. In college he double-majored in Bible and piano performance then fulfilled the M.Mus. in Church Music (piano) and an M.A. in Bible. During graduate school he won the SCMTA composition competition. He went on to the University of Oklahoma and received a Ph.D. in Piano Pedagogy under Jane Magrath. He has almost 40 years of experience in teaching. An active member of the Music Teachers National Association, he has been a state board member in South Carolina and Arizona, and his students have been laureates in the state, regional, and national levels (piano and composition). He has almost 30 years of experience in church music administration and has dozens of keyboard, choral, and instrumental publications in sacred and secular music. His hymns and psalm settings appear in several hymnals. He has adjudicated piano and composition for M.T.N.A,  N.F.M.C., and the National Piano Guild. Outside the classroom, his favorite things to do are teach piano lessons, write music and hymns, and play Ticket to Ride. His wife, Leslie, teaches at a classical Christian school; his daughter Bethany is an author and English teacher; and his daughter Emily works as a physical therapist technician.

Susannah Dornan, M.Ed.
Bible and Teacher Education Department Head, Education
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Susannah Dornan graduated from International Baptist College and Seminary (IBCS) with a degree in Bible and Elementary Education in 2009 and spent the next seven years teaching second grade in a Christian school. She was honored as Teacher of the Year by the Arizona Council for Private Education in 2014 and by her administration and co-workers in 2015. While teaching, she completed her Master of Education degree in Curriculum and Instruction with an emphasis in reading and language arts from Grand Canyon University. Desiring to “pass the torch” to the next generation of teachers, Susannah began teaching education classes and English at IBCS under the mentorship of her long-time teacher Miss Sandy Fullmer, who had a tremendous impact on her training as a teacher. As the head of the education department at IBCS, Susannah has a heart and passion to train excellent teachers who are prepared and well-equipped to serve in both church and school settings. She and her husband Jimmy live in Chandler, Arizona, and have two children, Henry and Jane.

Kristopher Endean, Ph.D.
Dean of Students; Bible and Christian Service Department Head, Bible, Theology
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Kristopher Endean was born into a pastor’s family in the city of Detroit and grew up two miles from the ocean in the woods of southern Maine. After finishing his college and seminary training in steamy South Carolina, he is delighted that God has led him to serve in sunny Chandler, Arizona, as Dean of Students and Department Head of Bible and Christian Service at IBCS. Dr. Endean has a passion for conservative Biblical scholarship and desires to see that training extended throughout our country and around the globe. In fact, he travels occasionally each year to teach block courses in Bible institutes in foreign countries. When Dr. Endean is not teaching or working in his office, he enjoys hiking, photography, music, and spending time with his wife and five young children.

Emmanuel Malone, M.Div.
Assistant Seminary Dean, Math, Theology, Pastoral Studies
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Pastor Emmanuel Malone had a passion for engineering as early as age twelve. He graduated with a Bachelor of Science in Electrical Engineering and an M.BA. in Organizational Behavior. He worked in the aerospace industry with GE, NASA, and the Department of Defense. He came to a saving knowledge of Jesus Christ a year after a work relocation to Minneapolis, Minnesota. The Lord called Pastor Malone to serve Him at the peak of his profession. He earned an M.Div. from Calvary Baptist Theological Seminary, in Lansdale, Pennsylvania, and completed the coursework for a Doctorate in Missiology. Pastor Malone was used by the Lord to plant and pastor three churches in Philadelphia and Chicago. After retiring as pastor of All Nations Baptist Church in Minneapolis, he relocated to Arizona to serve on the staff of IBCS.

Brittany Moffitt, Ed.D.
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Growing up in a Christian home with six younger siblings, Dr. Brittany Moffitt heard the gospel and accepted Christ at a young age. After surrendering her life to the Lord as a teenager at a Christian camp, she chose to follow God’s leading into full-time vocational ministry. This journey began with earning both her bachelor’s and her master’s in Christian education from IBCS. After working two years as a graduate assistant, Miss Moffitt accepted a full-time position at IBCS in 2020 as Registrar and as the administrative assistant to the Academic Dean. She recently completed an Ed.D. from Liberty University online.

As a native Coloradoan, she loves the mountains and delights in taking others on outdoor adventures, including the annual IBCS Grand Canyon hike. When she is not hiking or working, she enjoys walking, reading, and writing.

Dan Olson, M.S.
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Pastor Dan was blessed to have been saved at the age of six while attending a Christian school in Rosemont, Minnesota. After graduating from Tri-City Christian Academy, then in Tempe, Arizona, in 1982, he spent the next 30 years in the Air Force with a primary job of air traffic controller. During his service, he completed both a bachelor and a master's degrees in aeronautical science through Embry Riddle Aeronautical University. After retiring from the Air Force in 2012, he was invited to begin a management and leadership focus of studies at IBCS. He has been married to his wife Colette since 1984; they have two children and seven grandchildren. His greatest current interests include travel (generally to see his grandchildren) and good food.

Scott Olson, B.A.
Director of Mentoring and Recruitment
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Pastor Scott Olson was raised, discipled, and trained in Arizona at Tri-City Baptist Church. After coming to know the Lord Jesus as his Savior in his youth and growing in his walk of faith, he developed a desire to reach the youth of the West with the Gospel of Jesus Christ. After graduating with a Bachelor of Arts in Christian Service: Church Ministries at IBCS, Pastor Scott, his wife Susan, and their family served in youth ministry at Northwest Valley Baptist Church, where he was ordained as a minister in 1994 and served for 15 years. In 2005 the Olson family moved to California so that Pastor Scott could serve at Ironwood Christian Camp as program director and later as the director of the Ironwood Institute of Ministry and Ministry Bound programs. In 2018 God led Pastor Scott back home to Tri-City Baptist Church to serve as the Director of Mentoring and Recruitment at IBCS.

David Shumate, J.D., Ph.D.
Academic Dean
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Dr. David Shumate came to know the Lord while in Harvard Law School through the witness of a Christian classmate. He felt the call to full-time ministry and, after finishing his law degree, he attended Bob Jones University, earning his M.Div. and Ph.D. degrees and teaching in their School of Religion and Seminary for five years. After 15 years of assistant pastoral experience, he became the general director of Mexican Gospel Mission in 2005 where he served for 17 years. Since 2012 he has ministered at IBCS in various capacities, including adjunct faculty and Seminary Dean. Currently, he draws on this experience while serving as the Academic Dean for both the undergraduate and graduate programs at IBCS.

David Stertzbach, M.Mus.
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Pastor Stertzbach spent 11 years ministering in Williston, Vermont, before coming to Tri-City Baptist Church where he displays a passion to pastor God’s people through music. He has taught music on the high school and college levels for almost 30 years. He and his wife Becky were married in 1995 and have been in local church ministry since that time. They came to Tri-City Baptist Church in July 2005 and have two married children.

Pastor Stertzbach has a Bachelor of Arts in Church Music and a Master of Music with an emphasis in Choral Conducting, both from Bob Jones University.

Rebecca M. Stertzbach, M.C.Ed.
Executive Assistant, Director of Institutional Effectiveness, Language Arts
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Mrs. Rebecca Stertzbach grew up “at camp” in rural southeastern Pennsylvania. A graduate of two Christian colleges, she has a B.S. in English Education from Bob Jones University and an M.C.Ed. from IBCS with an emphasis in ministry and language arts. In her almost 30 years of teaching, she has taught all age groups, from toddlers up through college.

Currently, she serves as the Executive Assistant at International Baptist College and Seminary in Chandler, Arizona, also teaching in the English, speech, and education departments. She has a passion to impart to students the necessity and urgency of clearly communicating the Gospel message.

She has been married for over 25 years to Pastor Dave Stertzbach, Music Pastor at Tri-City Baptist Church, Chandler; they have two married children.


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