BOK Financial Corporation announced that Chief Financial Officer Steven Nell will retire effective March 31, 2023, after 30 years with the company and more than 20 years as CFO. Upon his retirement, Chief Risk Officer Marty Grunst will become the company's next CFO. As chief financial officer, Grunst will be responsible for all accounting and financial reporting, tax, corporate treasury, mergers and acquisitions, and investor relations.

In addition, the company's enterprise data and analytics function will continue reporting up through him. Grunst has been with the company since 2009, initially as treasurer and most recently serving as chief risk officer. He has more than three decades of experience in the financial industry, including treasury, corporate finance and line of business finance roles with Bank One (now JPMorgan Chase).

Grunst currently serves on the board of Junior Achievement of Tulsa and previously served on the Jenks Public School Foundation. Mindy Mahaney will assume the role of chief risk officer. She has been with the company since 2008 and most recently served as chief operating officer for wealth management.

Before joining BOK Financial in July 2008, Mahaney served as chief financial officer at Oklahoma's Spirit Bank. She previously spent a decade in public accounting at Arthur Andersen after graduating from Oklahoma State University with a double major in Agricultural Economics and Accounting. A Certified Public Accountant, she graduated with honors from the University of Colorado's Graduate School of Banking and has her Series 7 license.