Management

Terry Spencer is president and chief executive officer of ONEOK, responsible for the organizations’ operations and support functions, including corporate planning and development, human resources, information technology, corporate services, and investor relations and public affairs.

Spencer joined ONEOK in 2001 as director, project development, for natural gas gathering and processing. Later, he served as vice president of natural gas supply and project development in the natural gas gathering and processing segment. In 2005, Spencer became senior vice president of ONEOK’s natural gas liquids business following the asset acquisition from Koch. He became president of natural gas liquids in 2006. From 2007 to 2009, he was executive vice president of ONEOK, with responsibilities for ONEOK Partners’ natural gas liquids gathering and fractionation, and pipeline segments, as well as ONEOK's energy services segment.

He most recently served as chief operating officer of ONEOK Partners and was responsible for the partnership’s three operating segments – natural gas gathering and processing, natural gas pipelines and natural gas liquids.

Prior to joining ONEOK, Spencer held positions of increasing responsibility in the natural gas gathering and processing industry with Continental Natural Gas, Inc., in Tulsa; Stellar Gas Company in Houston; and Texas Oil and Gas Corporation’s Delhi Gas Pipeline subsidiary in Dallas.

He is a member of the Gas Processors Association board of directors.

Spencer earned a Bachelor of Science degree in petroleum engineering in 1981 from the University of Alabama in Tuscaloosa.

Rob Martinovich is executive vice president and chief administrative officer, responsible for environmental, safety and health, human resources, corporate services and information technology. Previously he served as executive vice president, commercial, and executive vice president, operations, of ONEOK and ONEOK Partners.

In 2012, Martinovich served as executive vice president, chief financial officer and treasurer of ONEOK and ONEOK Partners. He was ONEOK's chief operating officer, responsible for ONEOK’s natural gas distribution and energy services operating segments, as well as the company's environment, safety and health, and technical services organizations. He also served as president of ONEOK Partners; natural gas gathering and processing business from 2007 to 2009.

Prior to joining ONEOK in 2007, he was group vice president of environment, health and safety, operations and technical services of DCP Midstream, LLC. Martinovich joined DCP Midstream in 2000 as senior vice president, responsible for the Permian Basin assets and in 2002 was named senior vice president, responsible for the Mid-Continent and Rocky Mountain assets.

Before joining DCP Midstream, he was senior vice president of GPM Gas Corporation, the natural gas gathering, processing and marketing subsidiary of Phillips Petroleum Company. He joined Phillips in 1980 as a resin development engineer and held various engineering sales and marketing positions in the research and development divisions and the plastics divisions of Phillips, and served on the company’s corporate planning and development staff.

Active in industry affairs, Martinovich served as president of the Gas Processors Association from 2004 to 2006. In the community, he is the 2018 campaign chair for the Tulsa Area United Way and serves on the board for the YMCA of Greater Tulsa.

A native of Bartlesville, Oklahoma, Martinovich earned a Bachelor of Science degree in chemical engineering in 1980 from the University of Notre Dame in South Bend, Indiana. He also is a graduate of Harvard Business School’s Advanced Management Program.

Walter S. Hulse III is chief financial officer, treasurer and executive vice president, strategic planning and corporate affairs of ONEOK, responsible for corporate planning and development, market analysis, investor relations, corporate communications, community investments and public affairs.

Previously, Hulse served as executive vice president, strategic planning and corporate affairs, of ONEOK. Hulse joined ONEOK from Spinnaker Strategic Advisory Services, LLC, which provided consulting services to mid-cap and large-cap publicly traded companies, including the review of merger and/or acquisition opportunities, debt and equity markets, corporate restructuring and potential divestitures. Hulse served as a consultant to ONEOK for many years, including during the separation of the company's natural gas distribution business into the stand-alone publicly traded company, ONE Gas.

Previously, Hulse was vice chairman of the Investment Banking Department, managing director and head of the business development group at UBS Investment Bank. Prior to that, he was head of the Global Utility Group at UBS Investment Bank. Before joining UBS through its merger with PaineWebber Incorporated, Hulse held various roles at Paine Webber and J.P. Morgan.

Hulse graduated from the Wharton School at the University of Pennsylvania with a Bachelor of Science in economics.

Kevin Burdick is executive vice president and chief operating officer of ONEOK.

Burdick joined ONEOK in 2007 as manager, information technology design integration. Prior to his current position, Burdick served as executive vice president and chief commercial officer, responsible for all of our business unit commercial activities. Before that, he served as senior vice president, natural gas gathering and processing, responsible for all commercial aspects of the gathering and processing business unit, and before that served as vice president and chief information officer. Before joining ONEOK, he held information technology positions of increasing responsibility at CITGO Petroleum in Tulsa.

He is a member of LIFE Senior Services Board of Directors and is on the Global Outreach Leadership Team for Asbury United Methodist Church in Tulsa. He is a past cabinet member of the Tulsa Area United Way and also participates in various Habitat for Humanity events.

A native of Pryor, Oklahoma, Burdick earned a Bachelor of Science degree in mathematics in 1988 from the University of Oklahoma in Norman and a Master of Business Administration degree in 1995 from Oklahoma State University in Stillwater. He is also a graduate of Harvard University’s Advanced Management Program.

Steve Allen is senior vice president, general counsel and assistant secretary of ONEOK.

Allen joined ONEOK in 2006 and previously served as vice president and associate general counsel. Prior to working at ONEOK, he was a shareholder at GableGotwals, a Tulsa law firm.

Allen was appointed to the Oklahoma Water Resources Board by Governor Mary Fallin in May 2015 for a term expiring in 2021. Allen is also vice-chairman of the board of trustees for Oklahoma Baptist University, where he serves on the executive committee. He is a member of Leadership Tulsa Class 28, a member of First Baptist Church Jenks and a volunteer with Habitat for Humanity and the Boys Scouts of America. Professionally, he is a member of the American Bar Association, the Oklahoma Bar Association and the Tulsa County Bar Association. In 2009, Super Lawyers magazine named him an Oklahoma Rising Star.

A native of Massachusetts, Allen earned a Bachelor of Arts degree in political science in 1995 from Oklahoma Baptist University in Shawnee and a Juris Doctorate in 1998 from Vanderbilt University School of Law in Nashville, Tennessee.

Chuck Kelley is senior vice president, natural gas, of ONEOK, responsible for all commercial aspects of the natural gas gathering and processing, and natural gas pipeline business units. Previously, he was senior vice president, natural gas gathering and processing.

Kelley joined ONEOK in 2000 as manager of Midwest marketing for ONEOK Energy Marketing and Trading Company and later served as director, marketing; vice president, origination; senior vice president of ONEOK Energy Services; and vice president, commercial development. Prior to joining ONEOK, he held executive positions at both Tartan Energy Resources and Panda Resources, Inc. He also held various positions with Enron Corporation.

Kelley is a former member of the Midwest Energy Association where he served as director of the energy management committee. He is a current member and past board member of the Natural Gas and Energy Association of Oklahoma and is on the board of directors of A  New Leaf, Inc., an organization that provides vocational and residential services to individuals with developmental disabilities. Kelley volunteers with Challenger League youth sports and Special Olympics Oklahoma.

A native of Illinois, Kelley earned a Bachelor of Science degree in finance, with honors, in 1980 from DePaul University, College of Commerce, in Chicago.

Sheridan Swords is senior vice president, natural gas liquids, responsible for natural gas liquids gathering, fractionation, storage and pipelines. Prior to assuming this position, Swords was president of the natural gas liquids gathering and fractionation segment.

Swords began his career in the energy industry as a division engineer for Koch Gathering Systems Company in 1992. He held various positions with Koch companies, including operations management and commercial and commodity trading. Prior to joining ONEOK in 2005, Swords was vice president of the Mid-Continent of Koch Hydrocarbon, LP.

A native of Kansas, Swords earned a Bachelor of Science degree in mechanical engineering in 1991 from Kansas State University in Manhattan.

Mary Spears is vice president and chief accounting officer of ONEOK. She is responsible for ONEOK's accounting operations and financial reporting functions, from segment accounting through corporate consolidation and reporting.

Since joining ONEOK as a senior accountant, natural gas liquids, in 2008, Spears has held positions of increasing responsibility, including her most recent role as director, SEC reporting and corporate accounting. Before joining the company, she worked at Deloitte & Touche and Latham & Watkins.

Spears is a certified public accountant and a member of the American Institute of Certified Public Accountants, the Oklahoma Society of CPAs, and the Accounting Financial Women's Alliance. Active in the community, Spears serves as treasurer of the Council Oak Elementary Executive Board.

A native of Helena, Montana, Spears earned a Bachelor of Science degree in accounting in 2001 from Oral Roberts University in Tulsa, Oklahoma.

Eric Grimshaw is vice president, associate general counsel and corporate secretary of ONEOK.

Prior to joining ONEOK in 2002, he served as vice president, general counsel and secretary at Syntroleum Corporation from 1997 to 2002. Before joining Syntroleum, he was a partner with the Tulsa law firm of Pray, Walker, Jackman, Williamson and Marlar.

Grimshaw is a past president and chairman of Tulsa Opera. He also is a past chairman of Junior Achievement of Greater Tulsa and past secretary of the Oklahoma Alliance for Manufacturing Excellence. He was a member of the board of directors of XETA Technologies, Inc., a provider of advanced communication technologies located in Tulsa, until the company was sold in 2011.

He is a member of the American Bar Association, Oklahoma Bar Association and Tulsa County Bar Association, and is a member of the Society of Corporate Secretaries and Governance Professionals and the National Investor Relations Institute.

A Tulsa native, Grimshaw earned a Bachelor of Arts degree in 1974 from the University of Colorado in Boulder and received his Juris Doctorate in 1977 from the University of Tulsa.