Officers

Gary Fields has served as Chief Executive Officer of AAON since 2020 and as a Director since 2015. He previously served as President of AAON from 2016 to 2023. With detailed insight and knowledge of HVAC market trends, competitors, and AAON’s product lines, Gary guides the company's strategic opportunities to improve its position in the marketplace. His over 40 years of experience in the HVAC industry began in 1983 to 2012 as an HVAC equipment sales representative at Texas AirSystems. From 2002 to 2012, he was a member of the ownership group of Texas AirSystems, the largest independent HVAC equipment and solutions provider in Texas.

Gary has been significantly involved with the Fort Worth, Texas Chapter of ASHRAE, having served as Chairman of various ASHRAE committees and ultimately President of the Society. He is the owner and President of GKR Partners LTD, an HVAC business development consulting firm.

Matt Tobolski has served as President and Chief Operating Officer of AAON since January 2024. He leverages the talents of AAON’s operations, engineering, sales, marketing, and administration teams to drive sustainable growth and continue delivering best-in-class solutions to customers. Prior to this role, Matt served as President and Co-Founder of BASX Solutions from the company’s inception in 2013 until AAON acquired BASX. He served as the President and CEO of Tobolski Watkins Engineering, a structural and earthquake engineering firm, from 2008 to 2017 and as Executive Advisor at Structural Integrity Associates from 2017 to 2020, following the acquisition of Tobolski Watkins Engineering. Matt earned a BS in Civil Engineering from the University of Massachusetts Dartmouth and an MS and PhD in Structural Engineering from the University of California San Diego. He is a member of ASHRAE and ASCE and is a licensed Civil and Structural Engineer in California, Oregon, and Washington. 

Rebecca Thompson, Vice President of Finance, Chief Financial Officer, and Treasurer since 2021, is a licensed certified public accountant and member of the Choctaw Tribe. She previously served as AAON’s Chief Accounting Officer from 2012 to 2021. Rebecca leverages her expertise and strategic insights to ensure financial integrity, transparency, and compliance, optimize financial performance, and capitalize on opportunities for long-term success.

Prior to AAON, she served 11 years as Senior Manager in the assurance division at Grant Thornton, LLP. She received her Bachelor of Science in Accounting and Master of Information Systems and Accounting from the University of Tulsa. 

Casey Kidwell oversees human resources, security, safety, and IT to uphold AAON’s culture and ensure every team member has the tools they need to be successful inside and outside of work. He previously served as AAON’s Director of Administration since 2021 after working almost ten years in various HR and IT roles at WPX Energy, including as Human Resources Operations Manager. In March 2024, Casey received a Service Member Patriot Award from the Oklahoma ESGR (Employer Support of the Guard and Reserve).

Chris Eason is a licensed certified public accountant with 20 years of experience in financial reporting and accounting. He brings an extensive background in the implementation and compliance with internal controls, initial public offerings and other capital raising efforts, SEC quarterly and annual filings, accounting for business combinations, and restructuring initiatives. Chris previously served as AAON’s Controller and Financial Reporting Manager since 2018. Before joining AAON, he served over 13 years as Senior Manager in the assurance division at Grant Thornton, LLP. 

Stephen Wakefield joined the company in 1999. He most recently served as Chief Operating Officer of AAON Oklahoma and AAON Coil Products from 2020 to 2024. Stephen leverages his extensive knowledge and experience across all aspects of operations, engineering, and product design processes to champion AAON's culture, align team members with their skills and passions, and enable them to excel in their roles. With over 25 years at AAON, he held several roles, including Vice President of Engineering, Director of Engineering, Director of Design and Engineering Operations, Senior Manager of Research and Development, and Design Engineering Manager. He received his Bachelor of Science in Mechanical Engineering Technology from Oklahoma State University.

Matt Shaub, Executive Vice President and General Manager of the BASX Business Unit since January 2025, leads teams in engineering, product management, and customer care to drive innovation and rapidly respond to market demands. He brings extensive experience leading high-performance teams across manufacturing, engineering, program management, product management, M&A strategy, and customer service. Matt previously served as AAON's Global Director of Product Management in 2024, where he enhanced product management strategies for existing and new products and solutions. Prior to AAON, he served three years as Senior Vice President of Operations and Strategy at HB Global, LLC, and 22 years at Johnson Controls in various leadership roles, including Vice President of Strategy for DX Ducted Systems and Vice President and General Manager of Commercial Ducted Systems.