why ati jet

Our Team

Uncompromised Experience

We hire only the most experienced, best-trained individuals to join our distinguished team. The result is a safe and reliable service you can depend on because our team is the best at what they do. We demonstrate ownership, accountability, loyalty, and passion for service. Our top values are instilled in each and every employee and shared between departments.

Lyle Byrum


Lyle M. Byrum is currently the President, Chief Executive Officer and Director of Operations of ATI Jet. Mr. Byrum has been flying over forty years and has over 18,000 accident free flight hours, over8,000 hours of which are in Learjets. He started in the aircraft charter business in 1976 and has over 47 years management experience in the operation of air charter, aircraft manufacturing and flight instruction companies.

Mr. Byrum is the 2004 United States Golf Association New Mexico Senior Amateur State Champion. He was the 2005 Alto Country Club Champion and 2 times El Paso Country Club Senior Champion. He is three times Southwestern Superchargers Top Dragster Racing Champion and is the 2016 RODS Pro Mod Drag Racing Champion. He also is the 2015 International Hot Rod Association Southwestern Nationals Funny Car Champion.

Roberto A. Tohme​


Roberto Tohme graduated as Certified Public Accountant from Instituto Tecnológico y de Estudios Superiores de Monterrey, Campus Laguna, in May 1990. He is also an FAA licensed Airline Transport Pilot with over 2,600 hours experience, of which more than 1,900 hours are on turbine powered aircraft that have type ratings on Learjet series and Citation CE500 series, including company Learjet instructor privileges. Roberto joined ATI Jet in May 2006 when he acquired a stake on the company, bringing concepts of processes streamlining, cost evaluations and measures to reduce costs, procure financing for the company in more favorable terms and conditions, management of cash flows, oversight on accounting, tax-related matters, financial planning and reporting. Besides aviation, his other personal interests are golf and auto racing.

Nick Tyson​​

Vice President of operations

Nick started in the Marketing and Financial sectors building websites and developing brands for clients. He always had an urge to fly and started taking flying lessons working his way up to Commercial Pilot. In 2019 Nick joined the ATI team, currently flying as a captain and is combining his experience with client relationships, marketing and business development to help ATI pave a path for the future.

DeeAnna Underhill​​

Director of National Sales​​​

DeeAnna received her Bachelor of Arts Degree in Marketing and Accounting University of Texas El Paso. Since 2005 she has had an extensive carrier in the management of marketing and aircraft charter management on a regional and national basis.
She performed as Vice President of Sales and Marketing for ATI Jet Inc. from 2006 to 2010 where she facilitated an increase of sales revenue and led the establishment of ATI’s Vail Base of Operation.In 2011 she was an independent contractor for Bombardier Aerospace, Richardson, TX. Sales Manager for FlexJet, from April 2012 – May 2015. She served as Vice President of Sales – Southwest and Central Region for Unity Jets, from July 2015 – March 2017. From 2017 to 2020, she served as VP of Sales & Customer Service for Planesmart Aviation, managing all sales and new business activities of aircraft

James Grizzard


James received his A&P license from Rice Aviation in 1991. He started his first job in aviation at Julie’s Aircraft service from 1991 to 1998. While at Julie’s, he worked on aircraft ranging from a Cessna 150 to a Boeing 777. He then moved to Frontier Airlines where he worked at line service from 1998 to 1999 on their 737-200 and -300 fleet. James made the move to ATI Jet in 1999 and became the Director of Maintenance in 2001. He currently oversees the maintenance of ATI’s whole Learjet fleet.

Andre Anderson​


Andre started his aviation career in June 1981 by serving in the United States Air Force as a C-5A, B Crew Chief and later as Squadron Maintenance Supervisor. His service allowed him to attain his FAA Airframe and Powerplant Mechanic license. After being honorably discharged, he continued his aviation studies by attending Embry Riddle Aeronautical and pursing a degree in Professional Aeronautics. In 1995, he started and successfully operated Regional Air Charters of Florida (a Part 135 Operation) before selling the company to continue his career as a pilot. Going forward, he flew major FAA 135 cargo operations and an FAA 121 airline operations throughout the world.

Debi Ihnen

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Lorenzo Fierro

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