Meet Our Team
In the Board of Directors, Administration, Operational Staff, and Apprentices, God has placed a unique and capable team at MMS Aviation.
Our FAA certificated mechanics collectively have over 277 years of aircraft maintenance experience with expertise in:
- Inspection and routine aircraft maintenance
- Structural repair and modification
- Assembly and rigging
- Reciprocating engine overhaul
- Turbine engine maintenance
- Avionics installation
MMS Aviation is accredited by the Evangelical Council for Financial Accountability (ECFA) and complies with ECFA’s standards for responsible stewardship.
Josh and Kristi Adelsberger
Josh was born in Ohio but, because his father was in the military, he grew up traveling the world. He has always been interested in mechanical things and in high school learned God needed mechanically skilled people in missionary work. Josh says, “I went to college for missions, met a mission minded nursing student, married and 10 years later through many ups and downs we arrived at MMS in May of 2005 with 3 kids in tow.”
At MMS, Josh is an Aircraft Maintenance Supervisor. He oversees a variety of maintenance events, but much of the time Josh manages the engine shop. He obtained an FAA A&P mechanic certificate in 1996, and holds an Inspection Authorization.
Dale and Deborah Coates
Dale and Deborah are from Zimbabwe. Shortly after his schooling, Dale obtained his commercial pilot’s license. His experience and that of others showed him the value of being a mechanic as well as a pilot. Mike Dunkley, then a mechanic with Mission Aviation Fellowship (MAF) introduced Dale to missionary aviation. An MAF pilot/mechanic in Zimbabwe who had been an apprentice at MMS told Dale about maintenance training at MMS Aviation. The Coates came to MMS for training and, when that was completed, joined the MMS Staff.
At MMS, Dale is the Chief Inspector. He obtained an FAA A&P mechanic certificate in 1996, and holds an Inspection Authorization.
Keith and Karen Dodson
Keith was born and raised in California. Karen was born and raised in Pennsylvania. The Lord brought them together in ministry and marriage through mutual acquaintance with an apprentice family at MMS Aviation. Keith & Karen have a passion for sending “workers into his fields” and do so through providing administrative support and partnership services to those preparing for, and continuing in, faith-supported ministry. They train mission personnel to develop, maintain, and nurture the personal and financial relationships necessary to not only start field service, but to also stay in field service. With more than 20 years experience in candidate development and partnership services, Keith and Karen are, in many respects the first contact for those inquiring about service with MMS Aviation. Keith enjoys reading, writing, photography, and shooting. Karen enjoys crafting, sewing, baking, and shooting (though not necessarily in that order). Keith and Karen have previously served with MMS Aviation and have four years of mission service with MissionGO. They remember when the MMS parking lot was dirt. Keith serves as Mobilization Manager at MMS.
David and Allison DeJong
David grew up in New Mexico and Allison in Colorado. David worked four years with an organization that ministers to military personnel before God directed him to missionary aviation. (He had considered aviation ministry during high school.) Before coming to MMS, Allison served as children’s education director at the church they attended. Her primary responsibility now is care of their infant daughter.
At MMS, David is an apprentice aircraft mechanic and plans to serve in missionary aviation as a maintenance specialist.
Mike and Isobel Dunkley
Mike was born in England and grew up in Zimbabwe. Isobel was born and raised in Zimbabwe. Mike did a five year aviation maintenance apprenticeship with the national air carrier and worked for the airline before he and Isobel joined Mission Aviation Fellowship (MAF) in 1985. After 10 years of service in four different MAF programs in Africa, Mike became a maintenance instructor at Moody Aviation in Tennessee. Mike and Isobel joined the MMS Aviation Staff in 2005.
At MMS, Mike is an Aircraft Maintenance Supervisor. His work with Air Zimbabwe and MAF provides a wealth of turbine aircraft engine experience. Mike is highly experienced in avionics installation. He obtained an FAA A&P mechanic certificate in 1986, and holds an Inspection Authorization.
Chuck and Cathy Egbert
Chuck is from north-west Pennsylvania and had an interest in flying from an early age. He enrolled in the flight program at Kent State University. At Kent State he met Cathy and their interest in missionary service grew. Chuck began his apprenticeship at MMS March of 1996. After completion the Egberts served with a ministry in Alaska for a year. In 2001 they moved to South Africa to serve with Mercy Air. Non-renewal of their Visas by South Africa forced them to leave that work. Chuck and Cathy then joined the MMS Staff.
At MMS, Chuck is an Aircraft Maintenance Supervisor. Chuck is highly experienced in airframe restoration. He obtained an FAA A&P mechanic certificate in 1998, and holds an Inspection Authorization.
Glen and Kris Evert
Glen is from Wisconsin and Kris is an Ohio girl. For a number of years the Everts had a plumbing business in northeastern Ohio; however, both felt a tug toward missionary service. In pursuit of missionary aviation, Glen was accepted at a prestigious aircraft maintenance school near Pittsburgh. Circumstances kept him from attending, but soon afterwards Glen and Kris learned of MMS Aviation. Glen completed MMS’ maintenance apprenticeship in December 2016, after which he and Kris became MMS Staff members. Kris works in the bookkeeping department.
At MMS, Glen is an Aircraft Maintenance Supervisor. He obtained an FAA A&P mechanic certificate in 2016.
Jenny grew up in a Christian family in northeast Ohio, and was homeschooled along with two younger brothers. After graduating from the University of Akron in 2011, she worked as a mechanical engineer for three years before coming to MMS. Since her teen years, Jenny had a growing interest in missions. In college she looked into what role she might have and discovered the great need for mechanics in missionary aviation. Jenny says, “I became excited at the possibility of serving in this technical, hands-on, background sort of way!”
At MMS, Jenny is an Aircraft Maintenance Supervisor. Her engineering background is an asset that adds value to her service.
Mark and Janelle Heikoop
Born in Ontario, Canada, Mark Heikoop spent three of his teen years in Belgium where his family was involved in missionary work. Upon their return to Canada, Mark joined the family business where he realized his forte was construction and maintenance. With a heart for missions, he went on mission trips to Uruguay and Zambia. In Zambia Mark met Janelle who was a nurse and midwife at a clinic there. Mark obtained his FAA A&P Mechanic Certificate at the School of Missionary Aviation Technology in Michigan and is building maintenance experience at MMS.
Mark is preparing to serve as an aircraft maintenance specialist.
Ryan and Mary Hokuf
Ryan grew up in Maryland and Mary in upstate New York. Both were raised in strong Christian home environments. They met while attending Cedarville University where both earned Mechanical Engineering degrees. Their desire to serve in missionary aviation grew out of wanting others to come to faith in Christ, recognition of their abilities, and an interest in aviation.
Ryan is pursuing service as a Pilot/Mechanic in missionary aviation.
Dwight and Rena Jarboe
Dwight grew up on a family farm in central Kentucky. He joined Wycliffe Bible Translators in 1972 to be an aircraft mechanic with JAARS, Wycliffe’s technical support arm. Rena was born to missionary parents in India. They met while Dwight served with JAARS in North Carolina and together they were with the JAARS’ DC-3 program in Bolivia. The Jarboes joined MMS Aviation’s staff in 1982. Dwight was CEO from December 1983 through October 2016.
At MMS, Dwight is President Emeritus and aircraft mechanic. He obtained an FAA A&P mechanic certificate in July 1968, has held an Inspection Authorization since 1982, and in 1991 became an FAA Designated Mechanic Examiner.
Chris and Angie Jutte
Chris grew up on a farm in western Ohio and enjoyed the mechanical work that went along with farming. After high school, he went to technical school and began working as an auto mechanic. When Chris and Angie accepted Christ as their Savior in 1987, the Lord began to direct heir hearts to missionary service. On a short-term mission trip, Chris discovered the use of airplanes in missionary work. The Jutte family served in southeast Asia for 18 years and in 2018 returned to service with MMS.
At MMS,Chris is an Aircraft Maintenance Supervisor. He obtained his A&P license as an apprentice at MMS in 1998 and holds an Inspection Authorization.
Phil and Elizabeth Maddux
Phil is from Kansas. After graduating from Ozark Christian College, he began ministry as a Youth Minister. When exploring options of how to be involved in missions, he found there was a great need for pilots and mechanics in missionary aviation. He, Elizabeth and their children moved to Ohio in 2005 and Phil began his apprenticeship. After finishing the MMS program, Phil and his family served in Africa for 3 ½ years. As that assignment ended, MMS invited Phil back to join its staff in 2011. The MMS Board of Directors asked Phil to serve as MMS’ third President & CEO. He took office October 28, 2016. He obtained an FAA A&P mechanic certificate in 2007, and holds an MBA from Mount Vernon Nazarene University.
Bryan and Maria Martin
Bryan and Maria met at work, where Bryan the mechanic kept deliberately messing up the paperwork to talk to Maria the secretary. It worked, and they got married in 2013. Bryan has felt called by God to mission aviation since 2007 but was too stubborn to follow the call. In January of 2019 God worked anew in Bryan’s heart and after praying about it with his wife, decided to obey and trust God in this next step. Bryan and Maria live near Lancaster PA and have two children, Frederick age 3, and Aria age 2 months. It is their goal to bring glory to God by using the tool of aviation.
Jason and Anita Maust
Both from Ohio, Jason and Anita have, along with their regular employment, been involved in youth ministry almost 20 years at their local church. Jason’s work experience includes consulting and sales for a large lumber company. Along with a passion for ministry, Jason developed a keen interest in aviation. These led to preparation for missionary aviation service at MMS.
Having studied the French language 10 years during his schooling, Jason desires to serve as a missionary pilot/mechanic where French is spoken. Oui.
Terry and Laurie McClary
Terry is from southwestern Ohio. He retired at the end of 2009 from GE Aircraft Engine, Cincinnati, Ohio. During his time with GE, Terry and his wife Laurie, who is a Registered Nurse, participated in short term medical missions to Mexico, Guatemala, and Honduras. These trips brought them to sense a call to full time Christian service. Terry’s aviation background made missionary aviation a logical focus and the McClarys joined the MMS staff in March of 2010.
Terry has now retired from MMS, but he and Laurie still serve as Advocates for MMS, traveling to conferences and churches to share what God is doing through the ministry of MMS Aviation. He obtained an FAA A&P mechanic certificate in 2004 , and holds an Inspection Authorization.
Jim and Mary Newman
Jim is from northeastern Texas. Jim graduated from LeTourneau University with a degree in Mechanical Engineering Technology/Aviation Maintenance Technology. In 2000 he and his wife, Mary, joined World Gospel Mission to work with their aviation ministry in Bolivia. They were in Bolivia until 2009, at which time they were loaned to MMS Aviation. Jim says, “What attracted me to MMS was the quality of aircraft and mechanics they were preparing for the mission field.” Mary, along with Laurie McClary, ministers to apprentice wives.
At MMS, Jim is an Aircraft Maintenance Supervisor. He controls the flow of aircraft maintenance through MMS. He obtained an FAA A&P mechanic certificate in 1994.
Tim and Michele Obarow
The Obarows were active in their local church while living and working in the Reading, Pennsylvania area. In 1999 they responded to the Lord’s call to serve in missionary aviation. After acceptance into the apprenticeship at MMS and enlisting their support team, they began serving at MMS in August of 2001. Tim was no stranger to aviation maintenance as he’d been an aircraft mechanic in the US Air Force during his military service.
At MMS, Tim is the Director of Maintenance and Accountable Manager of MMS’ FAA Certified Repair Station. He obtained an FAA A&P mechanic certificate in 2003, and holds an Inspection Authorization.
Rebekah was raised in southwest Pennsylvania in a Christian family. Growing up with a dad who was a pilot and professional aircraft mechanic made an indelible impression on her, and from a young age she had a passion for aviation. As a child, she knew that God had called her into missions when her dad returned from a short-term mission trip and expounded on everything God had done. For the next 10 years she prayed that God would show her where He wanted her to serve as He prepared her for ministry. In 2019 Rebekah completed her private pilot’s license and will be pursuing advanced flight training in the future. At this time, she is raising support to serve as an apprentice with MMS so she can serve in missionary aviation full time in Alaska among the Native people.
Josh and Janice Snader
The Snader family moved from Michigan in June of 2019 to start their apprenticeship at MMS Aviation. Josh was born and raised in Pennsylvania while Janice was born in Paraguay but moved to Michigan when she was three. To make a long story short, a series of unlikely events led Josh and Janice to get married and settle in Michigan. Several years after they were married, Janice finally convinced Josh to pursue God’s call to serve at MMS Aviation and Josh has found excitement in tackling this new challenge and the opportunities ahead. The Snaders have two children: A three year old girl named Adilene (or Adi) and a one year old boy named Elliot. Josh is preparing to serve as a Maintenance Specialist and the family is planning to support Bible translation among unreached people groups.
Dennis and Mary Satterthwaite
Mary grew up in southeastern Ohio. Through a missionary speaker at her church, God began giving Mary, at age 13, a heart for missions. In college she pursued a degree in Business Administration and Accounting. Between semesters, Mary ministered on Native American reservations the south-western US, seeing a need for business majors in missions. Later, she married Dennis and they faithfully assisted with various ministries of their local church. In 1986 they talked about being involved in full time ministry. Later that year, through hearing an MMS staff couple at their church, God’s leading became clear. In 1987 Dennis and Mary began service at MMS.
At MMS, Mary is the Chief Financial Officer. She has also served as an office administrator.
Bob and Lisa Schwartz
Bob is from Minnesota and Lisa is from Texas. After college, Bob served in Alaska with SEND International (now SEND North). Lisa, a Medical Technologist, also went to Alaska to work in the medical clinic started by SEND. That’s where they met and continued to serve together after their marriage. One of Bob’s roles was as a pilot. When health concerns necessitated them leaving Alaska, they transitioned to MMS Aviation. After Bob’s completion of the maintenance apprenticeship, the Schwartzes joined the MMS staff.
At MMS, Bob is the Director of Training. Bob and Lisa’s passion is to prepare people to not just survive, but thrive in their missionary service. Bob obtained an FAA mechanic certificate in 2006.
Jay and Debbie Shearer
Jay grew up in Southeastern Pennsylvania and Debbie is from Colorado. They were married in 1984 and have three grown children. Jay has been working in general aviation since 1976 when he graduated from LeTourneau College.
He will be serving as a Maintenance Supervisor at MMS.
Dave and Sherry Shelly
David was born in Venezuela to missionary parents. During his childhood the family moved to southeastern Pennsylvania where his father pastored a church. David says, “My story is a story of a mediocre Christian life with a heavy bent on the ‘American Dream.’” However, God changed that. After 20 years of industrial work that included product production, facility maintenance, and safety services, David and Sherry were ready to accept staff positions at MMS Aviation.
At MMS, David is the Facility Maintenance Manager and Safety Officer. Sherry works in the finance department. They have been on MMS staff since 2005.
Keith and Jenny Woockman
Keith calls South Dakota home and Jenny is from St. Louis. Keith attended a Bible college in St. Louis and met Jenny at the church she attended. Both had gone on short-term mission trips but did not see themselves becoming missionaries. The Woockmans were in youth ministry six years before pursuing missionary aviation. During Keith’s first year in Bible college, however, a former missionary pilot introduced Keith to the needs of mission aviation.
Keith is pursuing service as a Pilot/Mechanic in missionary aviation.
Bob and Kym Campbell
Bob and Kym met at a square dance, and have been married for 26 years. They have six children, three boys and three girls, and live just outside of Mount Vernon, Ohio. They love the Lord and mission work. After they toured MMS with their church group, they began to ask how they could be involved with the work. Bob works in construction and home remodeling, and has been involved with property management. Bob will be serving MMS as the facilities maintenance manager.
Austin and Sharon Cleator
Austin and Sharon met at the Ethnos 360 training center in Colombia. Sharon is from Bogota, Colombia. Austin is from the U.S. and grew up in Georgia. Austin has felt a calling to missions from a young age and began studying Spanish because he felt the Lords leading to Colombia. Sharon responded to the Lords prompting in her early twenties to dedicate herself to full time service to the Lord while she was in college.
Austin enjoys working with his hands and studied aviation maintenance before going to Colombia. He desires to serve in missions through missionary aviation maintenance. Sharon enjoys languages and hopes to serve in missions teaching literacy or helping with translation of God’s word. Austin will be an apprentice at MMS Aviation.
Cheryl was born and raised in Ohio in a Christian family. Her father preached in various small churches around central Ohio. Cheryl entered the work force after 2 years at New York Christian Institute. She became interested in missions in the 1990’s and has been on short term mission trips to India, Sri Lanka, North Africa, and Peru. Cheryl holds a Bachelors of Business Administration degree from Mount Vernon Nazarene University. She’ll be serving on staff at MMS primarily in an administrative role and, since she enjoys mechanical work, will also be helping on the hangar floor as needs arise.
Kyle and Karissa Wagner
Kyle & Karissa met in flight school in Florida. They were married in 2013 and have two daughters together, Charlotte age 4 and Norah age 1.
The Wagner’s currently live in a small town in rural Nebraska. Kyle is a fencing specialist, mechanic, and truck driver by day and spends the evenings remodeling their old farmhouse. Kyle has 125hrs of flight training and earned his instrument pilots license through Missionary Flight Training in Ft. Pierce Florida.
The Wagner’s goal is to bring glory to Christ through service in mission aviation. Kyle will be an apprentice at MMS.