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Senior Leadership Team

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:

  • Truly care about each team member.
  • Support and develop each team member's career.
  • Listen and communicate continuously.
  • Encourage teamwork within and among all teams.
  • Focus on individual's strengths.
  • Celebrate success.
  • Provide timely and helpful feedback.
  • Focus on continuous improvement.
  • Have fun!
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Doug Alleman

Vice President Engine Services

Doug Alleman

Vice President Engine Services
Lincoln, NE (LNK)
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Doug Alleman

Vice President Engine Services

Currently Vice President of Engine Services, Doug joined Duncan Aviation 30 years ago as an A&P mechanic in the engine shop. Through the years, he's moved from team leader to tech rep to MPI Shop Supervisor to Engine Sales Service Rep. In 2008, Doug assumed the responsibilities of managing Airframe Service Sales, and in 2009, he added managing the Regional Managers to his lengthening resume. He became the manager of Customer Service in early 2015, and Doug joined the senior management team and was named Vice President of Customer Service in October of that year.

As Vice President of Engine Services, Doug will help integrate Duncan Aviation's recent authorization as a Pratt & Whitney Designated Overhaul Facility and lead the expansion of our Engine Services with other OEMs to ensure our engine services continue to be world class.

Doug and his wife Paula have been married for 27 years and enjoy spending time with family and friends.

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Mark Cote

V.P., Duncan Aviation Parts Sales, Avionics, Accessories & Satellites

Mark Cote

V.P., Duncan Aviation Parts Sales, Avionics, Accessories & Satellites
Lincoln, NE (LNK)
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Mark Cote

V.P., Duncan Aviation Parts Sales, Avionics, Accessories & Satellites

Mark Cote is Duncan Aviation's Vice President of Duncan Aviation Parts Sales, Avionics, Accessories & Satellites. In this position he provides leadership to the production and service areas of aircraft Accessories, Avionics/Instruments Component Repair, Duncan Aviation Parts and Rotables Sales and the network of avionics satellite locations around the United States.

Mark joined Duncan Aviation in 1987 as an avionics technician, fixing navigation and communication equipment. Throughout his career with Duncan Aviation, Mark has held several positions including customer service representative, project manager, program manager and project manager team lead and coordinator. In 2006, he became the Vice President of Completions and Modifications. Mark assumed his current position in 2014.

Mark has an Associates of Applied Science Degree in Electronic Engineering Technology.

Mark and his wife have two children. Mark enjoys motorcycle riding, home improvement, staying fit and spending time with his family.

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Nate Darlington

Vice President, Modifications and Completions, Battle Creek

Nate Darlington

Vice President, Modifications and Completions, Battle Creek
Battle Creek, MI (BTL)
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Nate Darlington

Vice President, Modifications and Completions, Battle Creek

Nate started at Duncan Aviation in 2001 as a completions technician in the Interior department. He was promoted to shift supervisor in 2005 and became the department scheduler in 2006. He assumed his current responsibilities in 2009.

Nate enjoys working and interacting with customers. It is gratifying for him to be on the front end of refurbishment projects and see the transformation of aircraft through the eyes of customers.

Nate is married. He is a big sports fan and tries to spend as much time possible outdoors. He enjoys hunting, fishing and spending time with his family. He supports the United Way to help those in his community.

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Chad Doehring

Vice President of Customer Service

Chad Doehring

Vice President of Customer Service
Lincoln, NE (LNK)
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Chad Doehring

Vice President of Customer Service

Chad Doehring is Vice President of Customer Service where he interacts with Duncan Aviation's customer and lead the customer service teams at our full-service MRO facilities in Lincoln, Nebraska, Battle Creek. Michigan, and Provo Utah.

Before starting this role in 2024, Chad was Chief Operating Officer at Duncan Aviation's Provo, Utah, facility, for four years. He originally joined the team in Provo in 2017 as VP of Operations where he worked closely with the existing team there to manage construction, staffing and ramp-up of the beautiful, new, full-service Duncan Aviation facility built between 2017 and 2020.

Prior to 2017, Chad held the positions of Airframe Manager and Customer Service Manager for 13 years. He was originally hired with Duncan Aviation in 1994 as an airframe mechanic specializing in Falcons and Hawkers and quickly worked up to team leader positions, shift supervisor, and eventually assistant manager. Prior to Duncan Aviation, Chad worked for Northrop Grumman on the B2 bomber as a structure, hydraulic and flight test mechanic. Chad holds an A&P license and Inspection Authorization (IA) from the FAA.

Chad and his wife Stacey have four children and enjoy spending time with them and their families. Chad has served on the Utah County United Way Board of Directors, Board of Directors for Southeast Nebraska Court Appointed Special Advocates and Nebraska Business Aviation Board of Directors.

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Todd Duncan

Chairman

Todd Duncan

Chairman
Lincoln, NE (LNK)
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Todd Duncan

Chairman

Todd Duncan was named Chairman of Duncan Aviation in 2007. In his 35 years with the company, he has served many roles, including vice chair and president of Duncan Aviation component services. Todd has a passion for aviation and has been an active private pilot since 1987, holding instrument and multi-engine ratings. He is also passionate about the business aviation industry and believes in giving back. He has been a member of the National Business Aviation Association since 2015 and served as the Chair of the Association's Associate Member Advisory Council in 2022. He has also served as Chairman of the board of the National Air Transportation Association. Currently, Todd is the Chair on the Board Directors for the Nebraska State Chamber. Todd graduated from Nebraska Wesleyan University with a degree in business administration and studied in the Stanford Executive Program in 2007. Along with his wife, Connie, he is active in several philanthropic activities including the Nebraska Chamber of Commerce, Nebraska Wesleyan University and Southeast Community College Foundation.

Todd and Connie have twin sons and two daughters-in-law: Harrison and Brooke; and Paul Kent "P.K." and Katie. Todd enjoys many activities with his family including traveling, boating, scuba diving and snow skiing. Todd is an enthusiastic golfer and fisherman, an active Phish Phan, and an avid traveler.

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Travis Grimsley

Vice President of Aircraft Services, Battle Creek

Travis Grimsley

Vice President of Aircraft Services, Battle Creek
Battle Creek, MI (BTL)
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Travis Grimsley

Vice President of Aircraft Services, Battle Creek

In 2019, Travis Grimsley was named Director of Maintenance for Airframe Services at the Duncan Aviation facility in Battle Creek, Michigan. He's also now a part of the Duncan Aviation Senior Management Team.

In 2005, Travis joined the Duncan Aviation team as a Line Services Representative, and he transitioned to Manager of Customer Service in 2016. The common thread in all of his positions at Duncan Aviation has been his genuine desire to provide a positive environment for customers and team members.

When he was growing up, his 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 pilots license when he was 21 years old, and he earned a Bachelors 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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Jamie Harder

Chief Financial Officer

Jamie Harder

Chief Financial Officer
Lincoln, NE (LNK)
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Jamie Harder

Chief Financial Officer

As Vice President and CFO, Jamie provides leadership for the accounting, credit, information services, material services, and treasury services areas. Before serving in her new role, Harder was a controller with Duncan Aviation for four years.

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, going to concerts, and playing with her niece and nephew.

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Kasey Harwick

Vice President - Aircraft Services

Kasey Harwick

Vice President - Aircraft Services
Lincoln, NE (LNK)
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Kasey Harwick

Vice President - Aircraft Services

When Kasey joined Duncan Aviation's Lincoln, Nebraska, location in 1999, he performed completions on green Astra SPX aircraft until he transitioned to the Airframe, which gave him experience on Astras, Learjets, and Challengers. After more than seven years as a Lead Technician, Kasey moved to a Team Leader position for a fleet customer program. He then served as the fleet program's Program Manager until mid-2017, when he took on the responsibilities of Director of Maintenance at the Battle Creek, Michigan, facility. In 2018, Kasey was promoted to Vice President of Maintenance and in 2019 he returned to Lincoln as Vice President of Aircraft Services. Kasey holds an Associate of Applied Science degree in Nondestructive Testing, a bachelor of science degree in Business with a minor in Marketing from Nebraska Wesleyan University, a Master's in Business Administration degree from Creighton University's Heider College of Business, and a Master of Science in Organizational Leadership from the University of Colorado at Boulder.

Kasey and his wife Faith have been married for more than 20 years and have two daughters, Elliott and Charlotte. In his free time, you'll find Kasey on the sidelines cheering on his daughters at one of their many events and working on his classic car or motorcycle.

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Aaron Hilkemann

Chairman of Board of Advisors

Aaron Hilkemann

Chairman of Board of Advisors
Lincoln, NE (LNK)
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Aaron Hilkemann

Chairman of Board of Advisors

Aaron is Duncan Aviation’s recent past President and Chief Executive Officer. He joined Duncan Aviation in 1996 as Executive Vice President and Chief Operating Officer. In 1997, he was appointed President.  

Prior to joining Duncan Aviation, Aaron was Vice President and Director of Financial Operations for FirsTier Financial, Inc. His background includes eight years of public accounting experience with KPMG Peat Marwick where he served as a Senior Audit Manager and concentrated in the areas of manufacturing, construction and banking industries. 

Aaron is past Chairman and member of the Board of Directors of GAMA (General Aviation Manufacturers Association). He has also served as Past Chairman of the AMAC (Associate Member Advisory Council) of NBAA and the NBAA Board of Directors. 

Aaron and his wife, Jennifer, have a blended family of seven children, two boys and five girls. Aaron is active in hiking, hunting, fishing, biking and most recently has become a bee keeper. 

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Leon Holloway

Vice President of Team Member Services

Leon Holloway

Vice President of Team Member Services
Lincoln, NE (LNK)
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Leon Holloway

Vice President of Team Member Services
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.
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Ryan Huss

Vice President of Sales and Marketing

Ryan Huss

Vice President of Sales and Marketing
Lincoln, NE (LNK)
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Ryan Huss

Vice President of Sales and Marketing

Ryan assumed his current role and became a member of Duncan Aviation's Senior Management Team in 2020. Prior to that, he managed sales for Airframe and Engine Services for the Lincoln, Nebraska, facility after initially joining the sales force in 2012. Ryan started his career with Duncan Aviation in 2001 as an Airframe Mechanic and was quickly promoted to Lead Mechanic and then Team Leader. Before joining Duncan Aviation, Ryan served in the U.S. Air Force as an Airborne Technician with the 1st Airborne Command and Control Squadron.

Ryan is a licensed A&P mechanic with AMT certificates through Embry Riddle Aeronautical University. He enjoys working with customers, building relationships with them, and providing them knowledgeable service options for maintaining their aircraft.

Ryan and his wife, Jennifer, have one son, Cole, and two daughters, Ashley and Emily. He enjoys spending time with his family and friends, fly fishing, hiking, and working out. Ryan is active in mentoring youth and enjoys coaching youth sports teams.

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Jeff Lake

President and Chief Executive Officer

Jeff Lake

President and Chief Executive Officer
Lincoln, NE (LNK)
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Jeff Lake

President and Chief Executive Officer

As President of Duncan Aviation, Jeff is responsible for the day-to-day guidance and development of the Duncan Aviation enterprise. He provides direction and leadership for the entire company and leads the senior management team.

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 Lincoln in 2008 where he was responsible for airframe, engine, and paint production areas and for 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 children and enjoy family activities, hiking, fishing, camping, golf and tennis. Jeff has served on the Allocation and Audit committees for United Way of Lincoln/Lancaster County. He also served on the Lancaster County Court Appointed Special Advocates for Children Board of Directors.

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Cobi Lane

Vice President of Aircraft Services

Cobi Lane

Vice President of Aircraft Services
Provo, UT (PVU)
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Cobi Lane

Vice President of Aircraft Services
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's 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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Kramer Lyons

General Counsel

Kramer Lyons

General Counsel
Lincoln, NE (LNK)
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Kramer Lyons

General Counsel

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 is 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 several years, and they have two children: Charlotte and Henry.

In their spare time, the family enjoys visiting zoos and state parks and spending summer days in the pool. Kramer is an avid golfer and enjoys hunting and fishing. He will occasionally sneak out with friends to catch a local dirt track race. 

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Mike Minchow

Chief Operating Officer

Mike Minchow

Chief Operating Officer
Lincoln, NE (LNK)
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Mike Minchow

Chief Operating Officer

Mike was named Chief Operating Officer of Duncan Aviation's Lincoln facility in July 2020. He joined Duncan Aviation's Senior Management Team in October 2015 where he served as Vice President of Modifications and Engineering and before that, Vice President of Sales.

Mike joined the Duncan Aviation Design Center team 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 for a large fleet customer. 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.

Mike has been actively involved in the local community through Leadership Lincoln and United Way and has served on various aviation industry boards including the Gogo Dealer Advisory Board, Honeywell Channel Partner Advisory Board, Aircraft Electronic Association (AEA) Board and most recently joined the NBAA Certified Aviation Manager Governing Board as a Community Director and the Lincoln Chamber of Commerce Board.

Mike and his wife Renae have three boys: Andrew, Mason, and Aden. Mike enjoys golfing, hiking, and traveling.

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Andy Richards

Chief Operating Officer

Andy Richards

Chief Operating Officer
Battle Creek, MI (BTL)
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Andy Richards

Chief Operating Officer

Andy was named Executive Vice President and Chief Operating Officer of Duncan Aviation's Battle Creek facility in February 2019. For seven years before that, he held the position of Vice President of Completions and Modifications where he oversaw the Battle Creek paint and interior completions teams and provided on-site support for OEM completions, engineering and certification in Battle Creek.

Andy joined Duncan Aviation in 1997 working as a cabinet shop technician. He spent time leading teams in both cabinet and completions and was promoted to assistant manager of interior completions. In 2008, Andy became involved in Duncan Aviation's OEM completions program and was promoted to Program Manager one year later.

Andy has a Bachelor's of Arts degree and a Master's of Fine Arts degree.

Andy and his wife Pam enjoy spending time with their two daughters and going to their cabin on the Au Sable River in northern Michigan. Andy enjoys fly fishing and likes to stay in shape by practicing yoga, biking to work, and exercising in the workout facility at Duncan Aviation.

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Phil Suglia

Vice President of Modifications and Completions

Phil Suglia

Vice President of Modifications and Completions
Provo, UT (PVU)
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Phil Suglia

Vice President of Modifications and Completions
As Vice President of Modifications and Completions for Duncan Aviations 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 Aviations 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 Aviations 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.