Since Duncan Aviation was founded in 1956, the members of the Duncan family have always been actively involved in leading the company. In addition to the family influence, the company’s leadership dynamic includes vice presidents and executive officers of Duncan Aviation who form the Senior Leadership Team. They pursue a constructive dynamic that allows them to strategically position the company for long-term success and respond to sudden changes in the industry.
The Senior Leadership Team is responsible for modeling and maintaining Duncan Aviation’s Leadership Values. Duncan Aviation leaders:
At the end of 2026, Travis was named Executive Vice President and General Manager of Duncan Aviations Michigan Operations. In this position, he oversees every aspect of the service facilities in Battle Creek and Kalamazoo, Michigan.
Travis joined Duncan Aviation in 2005 as a Line Services Representative and has steadily taken on positions of increasing responsibility. He transitioned to Manager of Customer Service in 2016 and Director of Maintenance in 2019 before becoming Vice President of Aircraft Services, a position he held until late 2026. Throughout his career, a common thread has been his genuine desire to create a positive experience for customers and team members and to build relationships based on trust.
When he was growing up, Travis' father was an airline mechanic at Northwest Airlines in Detroit, and he inspired Travis to pursue a career in the aviation industry. Travis earned his pilot's license when he was 21 years old, and he earned a bachelor's degree in Business from Western Michigan University in 2012. He feels fortunate to have been able to make a living in working in a field he's always been so fond of.
Travis and his wife Dawn have three children, and in his spare time, they going skiing and boating and travel to Northern Michigan to enjoy the outdoors.
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As Executive Vice President and CFO, Jamie provides leadership for the accounting, credit, information services, material services, research & development, and the corporate flight departments of Duncan Aviation. She has held the CFO position since 2018 and was hired in 2014 as the company controller.
Harder earned a degree in Business Administration, Accounting, and Management at Midland University in Fremont and gained seven years of experience working in both private and public accounting prior to coming to Duncan Aviation.
In Harder's free time, she spends as much time outside as possible, and that includes working in the yard, going for long bike rides, golfing, and playing volleyball. She also enjoys traveling, cheering for Husker athletics, and going to concerts.
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Leon Holloway is Vice President of Team Member Services and a member of the Senior Management Team for Duncan Aviation. Leon's areas of responsibility include all core functions of Human Resources and Professional Development & Training enterprise-wide.
As a Senior Management member, Leon contributes directly to the organization's long- and short-term strategic objectives while maximizing organizational effectiveness.
Leon has more than 18+ years of leading human resources. Before joining Duncan Aviation, he was the Director of Human Resources for Even Temp, a renewable energy manufacturer of St. Croix pellet stoves and furnaces, and earlier in his career, he held leadership positions as an IT Supervisor for Metro Group, a direct-marketing company.
Some of his areas of expertise include: Leading enterprise-wide HR projects; overseeing State and Federal Regulatory Compliance; helping with employee relations and conflict management; standardizing HR policies and procedures; engaging in talent management and performance development; developing employee engagement and retention strategies; and personal and financial wellness. Leon also collaborates with Duncan Aviation's Senior Management and third-party vendors to review the company's benefits plan and compensation surveys.
Leon serves on several advisory boards, including the Greater Lincoln Workforce Development Board; NBAA Diversity, Equity, and Inclusion Working Group; Continuum EAP Board; The Malone Center; and The Good Neighbor Community Center.
Leon holds an MBA in Human Resource Management from Columbia Southern University and a BA in Organizational Management from Concordia University. In his free time, Leon serves as an Adjunct Teacher for the MBA program at his alma mater Concordia University.
He and his wife, Jan, have 4 adult children and 10 grandkids. Leon also enjoys riding his fat-tire bike.
Jeff retired as Chief Executive Officer of Duncan Aviation at the end of 2026, where he was responsible for the long-term strategic direction of the Duncan Aviation enterprise. Prior to that he was also President, where he had enterprise-wide, day-to-day oversight tasks until stepping back from that role in 2025. He is now Chairman of the Duncan Aviation Advisory Board.
Jeff joined Duncan Aviation in 1993 as Company Controller and soon became Vice President of Finance. He was promoted to Chief Financial Officer in 1998. Jeff assumed the role of Executive Vice President and COO of the Lincoln facility in 2008, where he was responsible for the Airframe, Engine, and Paint production areas and for Customer Service, Line Services, Facilities, Quality Assurance, and the Flight Department.
Prior to Duncan Aviation, Jeff worked as a Regional Controller for International Paper. He has also worked as a CPA in public accounting. Jeff graduated from the University of Nebraska-Lincoln with a Bachelor of Science degree in Business Administration with an emphasis in Accounting.
Jeff and his wife, Diana, have three adult children and enjoy spending time with family, hiking, fishing, camping, and playing golf and tennis. Jeff has served on the Allocation and Audit committees for the United Way of Lincoln/Lancaster County and was the 2025 Campaign Chair.
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Cobi Lane is Duncan Aviation’s Director of Production Operations in Provo, Utah, where he is responsible for leading the Airframe, Engine and Modifications production areas at Duncan Aviation's newest full-service facility.
Before joining Duncan Aviation in March 2021, Cobi spent 21 years working in business aviation in various roles, including Tech 2 Mechanic, Senior Tech, Mechanical Team Leader, Shift Leader, Service Team Manager, Operations Manager, and Director of Customer Service at Gulfstream Aerospace. Prior to beginning his career in the business aviation industry, Cobi served in the United States Air Force for seven years and worked as maintenance Crew Chief for the KC-135R model tanker.
Cobi earned a Bachelors Degree in Professional Aeronautics from Embry-Riddle Aeronautical University in Daytona Beach, Florida, and he subsequently earned his Airframe and Powerplant licenses. He and his wife Tiffany enjoy spending time together as a family with their children. Cobi also enjoys fishing, working out and bowling.
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As General Counsel, Kramer Lyons provides legal guidance when the company is negotiating contracts with OEMs and vendors, assists HR with personnel matters, assists with Aircraft Sales transactions, and handles real-estate leases for Duncan Aviation facilities. He's also an officer who provides legal advice and assistance to the Duncan Aviation Board of Directors, Board of Advisors, Duncan family shareholders, Senior Management Team, Department Managers, and other company employees regarding the company's business and legal matters.
After earning his undergraduate degree in Economics from Hastings College in Hastings, Nebraska, Kramer attended the University of Nebraska College of Law. Prior to joining the Duncan Aviation Senior Management Team, Kramer was an attorney with the Lincoln, Nebraska-based law firm O'Neil Heinrich where he focused on general corporate law, business and commercial transactions, mergers and acquisitions, and construction law.
Although Kramer and his wife, Jamie, met in 9th grade on a golf course in Hastings, the two didn't start dating until they were both in college. Jamie has been a first-grade teacher at Arnold Elementary School in Lincoln for the last seven years, and they have two children: Charlotte (4) and Henry (2).
In their spare time, the family enjoys visiting zoos and state parks and spending the summer days in the pool. Kramer is an avid golfer and is hoping to introduce the sport to his children soon! He also enjoys hunting and fishing and will occasionally sneak out with friends to catch a local dirt track race.
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Justin Merkling joined Duncan Aviation's Senior Leadership Team in November 2026. He brings more than 25 years of Duncan Aviation experience to the role of Vice President of Modifications for Battle Creek, where he oversees Interior, Avionics Installations and Engine/Accessory.
Justin joined Duncan Aviation in 1999 as an Airframe Technician and has built a career spanning technical, operational, leadership, and customer-facing roles. His positions have included Citation & Hawker Tech Rep, Engine Services Manager, Accessory Manager, and, most recently, Battle Creek Customer Service Manager. That breadth of experience gives Justin a unique understanding of an aircraft project from both the technical and customer perspectives.
Justin and his wife, Adrianne, have three sons and enjoy staying active as a family year-round. During the winter, they can often be found skiing at destinations across Michigan, while the warmer months are spent enjoying the outdoors and attending live music events together.
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As President of Duncan Aviation, Mike is responsible for the day-to-day guidance and development of the Duncan Aviation enterprise. He provides direction and leadership for all Duncan Aviation locations and personnel and leads the Senior Management Team.
Mike is a longtime team member with Duncan Aviation, joining the Duncan Aviation Design Center in 1993 as a Designer while working on his Masters degree in architecture at the University of Nebraska-Lincoln. He transitioned to Team Leader of Design, moved to Sales Team Leader, and then on to Program Manager. He was promoted to Sales Manager over Modifications (Paint, Interior, Avionics, and Install) and assumed those responsibilities for Airframe and Engine in 2011. In October 2015, he was promoted to Duncan Aviation's Senior Management Team as Vice President of Sales and then Vice President of Modifications and Engineering. Mike was named Chief Operating Officer-Lincoln in July 2020 and now serves as Duncan Aviation President.
Mike has been actively involved in the local community and has served on various aviation industry boards including the Gogo Dealer Advisory Board, Honeywell Channel Partner Advisory Board, Aircraft Electronic Association (AEA) Board, the NBAA Certified Aviation Manager Governing Board, Board Member at Gama, and the Lincoln Chamber of Commerce Board.
Mike and his wife Renae have three boys: Andrew, Mason, and Aden. Mike enjoys hiking, golfing, and attending family activities.
Jeremy Rangel is the Vice President of Maintenance for Duncan Aviation’s Lincoln, Nebraska, facility, a position he accepted in early 2025 and where he is responsible for all airframe and paint services.
Before that, Jeremy was the Airframe Services Manager in Lincoln since 2017. Jeremy held several positions of increasing responsibility including a Technician on the fuel team, a Falcon Aircraft Mechanic, and Weekend Shift Team Leader. He joined Duncan Aviation in 2010 as a technician without an A&P. Jeremy earned his A&P certification while working for Duncan Aviation. He used his experience and his understanding of the shortfall for A&P technicians in the aviation industry to help develop and start Duncan Aviation's A&P Apprenticeship Program.
Before joining Duncan Aviation, Jeremy was a C-130 Crew Chief in the Air Force for six years. He has previously been on the Advisory Board for the Iowa Western Community College Aviation Department and the Western Nebraska Community College. While at Duncan Aviation, Jeremy earned his bachelor's degree in Business through Bellevue University.
Jeremy is married to Elizabeth and has five daughters - Kailey, Kaydence, Maddy, Emma and Allison - ranging in age from 9 to 24. He loves to fish and enjoys spending time as a family and going to the lake with extended family. He is currently working on a master’s degree in Finance.
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Scott Stoki is a seasoned aviation leader with decades of hands-on experience in engine maintenance, repair, and overhaul. His journey began in 2005 as an Engine Line Technician, and his subsequent roles in Quality Assurance and management have provided him with a comprehensive, 360-degree view of the maintenance lifecycle.
As the Vice President of Engine Operations, Scott focuses on scaling Duncan Aviation's engine service offerings across multiple OEM platforms. By optimizing the company's new 36,000-square-foot Designated Overhaul Facility and integrating strategic in-house parts sourcing, he ensures that flight departments receive both cost-effective and high-performance solutions.
Scott's dedication to precision extends well beyond the hangar. An accomplished racer at the Bonneville Salt Flats, he personally assembled the engine for his 1985 Pontiac Firebird, achieving a personal best of 241 MPH.
Scott and his wife Kristina enjoy spending time on their acreage raising their 2 dogs and 2 cats, growing food in their garden, and maintaining their classic car collection.
As Vice President of Modifications and Completions for Duncan Aviation’s Provo, Utah, facility, Phil Suglia is responsible for the Interior, Avionics Installations, and Avionics Line teams at the Provo facility.
Phil began his aviation career in 2000 as a Line Services Representative for Duncan Aviation’s Battle Creek, Michigan, facility while completing his Bachelors of Business Administration-Advertising at Western Michigan University in 2003. Before moving to Sales in 2009, he was the FBO Line Services Manager in Battle Creek and Kalamazoo, Michigan, for three years. Most recently, he was responsible for Duncan Aviation’s Regional Managers located throughout the world.
Promoting teamwork and building relationships inside and outside of the organization is what Phil enjoys the most. Encouraging team members to pursue innovative ideas through creative thinking is his primary focus and he works hard to build a culture of quality and trust among team members and clients.
In his spare time, Suglia has served on various community and industry boards, including the Greater Kalamazoo/Battle Creek United Way Cabinet, as the Committee Chair of the NBAA Workforce Development Subcommittee, on the NBAA Maintenance Committee, and on both the Collins Aerospace and Gogo Business Dealer Advisory Boards.
He enjoys live music and any venue or activity where he can meet and interact with people.
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