The board of directors of ONEOK, Inc. elected Mark A. McCollum and Precious Williams Owodunni as independent directors to the board, effective January 23, 2026. McCollum, 66, is the retired president and chief executive officer of Weatherford International plc, having led the company from April 2017 through June 2020. Before joining Weatherford, he served as executive vice president and chief financial officer of Halliburton Company.
Prior to his tenure at Halliburton, which began in 2003, McCollum held senior leadership positions at Tenneco Inc. from 1995 through 2003, including serving as the company?s chief financial officer. Earlier in his career, he spent 14 years with Arthur Andersen LLP, ultimately becoming an audit and advisory partner in the firm?s global energy practice. McCollum currently serves on the boards of Westlake Corporation and Seadrill Limited.
He previously served as a director for Marathon Oil Corporation. McCollum holds a Bachelor of Business Administration degree from Baylor University. Owodunni, 50, is the chief executive officer of Mountaintop Consulting, a strategy, organizational development, and leadership advisory firm that serves blue-chip corporate clients globally, including Fortune 500 energy companies, investment banks, law firms and private equity firms. Before establishing Mountaintop in 2009, she was a vice president at Goldman Sachs & Co., where she made private equity investments in high-growth businesses and served on the boards of several portfolio companies.
Owodunni began her career at Goldman Sachs as an investment banker in the Mergers and Strategic Advisory Group, where she advised oil and gas, power, retail, and industrial companies on mergers, acquisitions and corporate finance matters. Owodunni has served on the board of Cadence Bank since 2019. She graduated from Yale University with a Bachelor of Arts in Ethics, Politics, and Economics and received her J.D. from Yale Law School.
In connection with the appointments, McCollum was appointed to serve on ONEOK?s Audit Committee and Corporate Governance Committee, and Owodunni was appointed to serve on ONEOK?s Executive Compensation Committee and Corporate Governance Committee.
