| Larry C. Larsen |
Larry C. Larsen is currently Chief Operating Officer & Executive Vice President at The Williams Cos., Inc., a position held since 2025. Education includes an undergraduate degree from the University of Utah, conferred in 1998. |
| Robyn L. Ewing |
Robyn L. Ewing is currently the Director at the Tulsa Performing Arts Center Trust, Tulsa Public Schools Foundation, Tulsa Community Foundation, The Child Abuse Network, Southwestern Regional Medical Center, Inc., Foundation for Tulsa Schools, River Park Foundation, Tulsa Educare, and The Williams Cos., Inc. She is also a Member of the HR Policy Association, National Association of Corporate Directors (Virginia), Society for Human Resource Management, The Human Resource Planning Society, Roundtable Group, Southwest Benefits Association, EWF International, and a Trustee at Oklahoma State University-Tulsa. In the past, Ms. Ewing served as the Chairman at Tulsa Area United Way, Director-Workforce Planning at MAPCO, Inc., Director at Domestic Violence Intervention Services, American Heart Association, Inc., Leadership Oklahoma, Cancer Treatment Centers of America, Inc., Oklahoma Arts Institute, The Parent Child Center of Tulsa, Inc., Chief Administrative Officer at WPX Energy, Inc., and Programmer at Cities Service Co.. She obtained her undergraduate degree from The University of Tulsa in 1976. |
| John D. Porter |
John D. Porter is currently Director at Energy Infrastructure Council and Chief Financial Officer & Executive Vice President at The Williams Cos., Inc. Formerly, Mr. Porter was Chief Accounting Officer & Vice President at Transcontinental Gas Pipe Line Co. LLC and Vice President-Investor Relations at Williams Partners LP. Education includes an undergraduate degree from Oklahoma State University, conferred in 1993. |
| Stephen W. Bergstrom |
Stephen W. Bergstrom is Executive Chairman, Co-President & CEO at Magnolia Infrastructure Partners LLC. He is Chairman at The Williams Cos., Inc. since 2026. He is Director at Third Coast Midstream Holdings LLC since 2015. Former roles include President, CEO & General Partner at American Midstream LLC, Chairman at Williams Partners LP, Director at Third Coast Midstream LLC from 2015 to 2019, and President & Chief Operating Officer at Dynegy, Inc. Education includes an undergraduate degree from Iowa State University conferred in 1979. |
| Terrance Lane Wilson |
Terrance Lane Wilson currently works at Tulsa Community Foundation, as Director, River Park Foundation, as Director, Tulsa Friends of Finance University of, as Director, Tulsa Area United Way, as Director, The Williams Cos., Inc., as Senior Vice President & General Counsel from 2017, Williams Pipeline GP LLC, as General Counsel & Senior Vice President, and Women's Energy Network, as Member-National Advisory Council. Mr. Wilson also formerly worked at Hall, Estill, Hardwick, Gable, Golden & Nelson PC, as Director & Partner, The University of Tulsa Lettermen's Association, as Director & Vice President, Tulsa Habitat for Humanity, as Director, Eisenhower Foundation, as President, Crosstown Learning Center, as President, and Williams Partners LP, as Senior Vice President & General Counsel. Mr. Wilson received his undergraduate degree in 1989 from The University of Tulsa and graduate degree in 1994 from The University of Tulsa College of Law. |
| Debbie Cowan |
Debbie Cowan currently works at The Williams Cos., Inc., as Chief Human Resources Officer & Senior VP from 2018, Tulsa Area Human Resources Association, as Member, and Society Of Human Resources Management, as Member. Ms. Cowan also formerly worked at John Zink Co. LLC, as Global Director-Human Resources from 2005 to 2013, Robert Half, Inc., as Staffing Manager from 2000 to 2001, Koch Chemical Technology Group LLC, as Global Vice President-Human Resources from 2013 to 2018, and Aircraft Fueling Systems, Inc., as Manager-Human Resources from 2002 to 2005. Ms. Cowan received her undergraduate degree from The University of Arkansas and graduate degree from the University of Oklahoma. |
| Mary A. Hausman |
Ms. Mary A. Hausman, CPA, is a Chief Accounting Officer, VP & Controller at The Williams Cos., Inc., a Chief Accounting Officer & Vice President at Northwest Pipeline LLC and a Chief Accounting Officer & Vice President at Transcontinental Gas Pipe Line Co. LLC. Ms. Hausman was previously employed as a Vice President & Chief Accounting Officer by NV Energy, Inc. She received her undergraduate degree from Kansas State University. |
| Chad J. Zamarin |
Chad J. Zamarin is President, Chief Executive Officer & Director at The Williams Cos., Inc. since 2025. Holds director roles at Williams Pipeline GP LLC, Interstate Natural Gas Association of America, and Caiman Energy II LLC. Serves as Director & Senior Vice President-Corporate at WPZ GP LLC since 2018. Formerly Director & SVP-Corporate Strategic Development at Williams Partners LP from 2017 to 2018. Served as President & Senior Vice President-Pipeline at Cheniere Energy, Inc. from 2014 to 2017. Chief Operating Officer at NiSource, Inc. from 2012 to 2014. Vice President-Engineering at Columbia Pipeline Group, Inc. Chief Operations Officer at Nevco, Inc. from 2011 to 2014. President at Pennant Midstream LLC. Chief Operating Officer at Columbia Midstream & Minerals Group LLC from 2011 to 2014. Education includes undergraduate degree from Purdue University and MBA from the University of Houston. |
| Alan S. Armstrong |
Alan S. Armstrong is Chairman & Chief Executive Officer at WPZ GP LLC since 2018. Mr. Armstrong is Executive Chairman at The Williams Cos., Inc. starting 2025. Mr. Armstrong is Independent Director at BOK Financial Corp. since 2013. Mr. Armstrong is Director at American Petroleum Institute, Inc., The Philbrook Museum of Art, American Exploration & Production Council, Tulsa Metro Chamber, The Gilcrease Museum National Board, The Williams Foundation, Junior Achievement USA, Energy Infrastructure Council, and The Business Roundtable. Mr. Armstrong is Director at Junior Achievement of Oklahoma, Inc. since 2013. Mr. Armstrong is Director at The University of Oklahoma Foundation, Inc. Mr. Armstrong is Member-Distinguished Graduates Society at the University of Oklahoma and Gallogly College of Engineering. Mr. Armstrong is Director at Constellation Energy Corp. starting 2026. Formerly, Mr. Armstrong was Chief Executive Officer at Williams Partners LP in 2011. Mr. Armstrong was Chairman at WPX Energy, Inc. in 2011. Mr. Armstrong was Chairman-Energy Division at Tulsa Area United Way. Mr. Armstrong was Vice Chairman at Junior Achievement, Inc. Mr. Armstrong was Chairman at Tulsa Regional Chamber of Commerce. Mr. Armstrong was Vice Chairman at The National Petroleum Council. Mr. Armstrong was Director at Goodwill Industries of Tulsa, Oklahoma Business & Education Coalition, Inc., and Third Coast Midstream LLC. Mr. Armstrong was Chief Operating Officer & Director at Williams Partners LP from 2005 to 2010. Mr. Armstrong was Senior Vice President at Williams Partners GP LLC from 2010 to 2011. Mr. Armstrong was Vice President at The Natural Gas Supply Association. Mr. Armstrong was President-Elect at Gas Processors Association from 2009 to 2011. Mr. Armstrong earned an undergraduate degree from the University of Oklahoma in 1985. |
| Richard E. Muncrief |
Richard E. Muncrief currently works at The Williams Cos., Inc., as Independent Director from 2022, American Petroleum Institute, Inc., as Director, American Exploration & Production Council, as Director, Indian Nations Council-Boy Scouts of America, as Director, and Metropolitan Tulsa Chamber of Commerce, as Member. Mr. Muncrief also formerly worked at WPX Energy, Inc., as Chairman, President & Chief Executive Officer in 2017, Devon Energy Corp., as President, Chief Executive Officer & Director from 2021 to 2025, Apco Oil & Gas International, Inc., as Chairman from 2014 to 2015, Quest Midstream Partners LP, as President, Chief Operating Officer & Director from 2007 to 2008, Burlington Resources, Inc., as General Manager-Operations, Continental Resources, Inc., as Senior VP-Operations & Resource Development from 2009 to 2014, ConocoPhillips, as Operations Manager-San Juan Basin Unit in 2007, and Resource Production Co., as Business Manager from 2008 to 2009. Mr. Muncrief received his undergraduate degree in 1980 from Oklahoma State University. |
| Scott Douglas Sheffield |
Scott Douglas Sheffield was the founder of Pioneer Natural Resources Co., founded in 1997, where the title held was Director from 2023 to 2024. Current jobs include Chairman & Chief Executive Officer at Pioneer Natural Resources GPC, Inc. since 2007; Independent Director at The Williams Cos., Inc. since 2016; Director at SMU-Cox School of Business; and Non-Executive Director at Tamboran Resources Corp. starting in 2025. Former jobs include Chairman & Chief Executive Officer at Parker & Parsley Petroleum Co. from 1989 to 1997; Chief Executive Officer at Pioneer Southwest Energy Partners LP from 2007 to 2009; Chairman & Chief Executive Officer at Parker & Parsley Development Co. from 1979 to 1989; Chairman & Chief Executive Officer at Pioneer Natural Resources Gp LLC from 2008 to 2013; Director at Evergreen Resources, Inc. from 1996 to 2004; Independent Non-Executive Director at Santos Ltd. from 2014 to 2017; Director at America's Natural Gas Alliance; Director at The National Petroleum Council; Director at Maguire Energy Institute; and Production & Reservoir Engineer at Amoco Production Co. Education includes undergraduate studies at The University of Texas at Austin. |
| Michael A. Creel |
Michael A. Creel currently serves as Independent Director at The Williams Cos., Inc. since 2016. He is Director & Manager at Lucid Energy Group II LLC. He is a Member of The American Institute of Certified Public Accountants, Financial Executives International, and Texas Society of Certified Public Accountants. Formerly, Mr. Creel was President, Chief Executive Officer & Director at Enterprise GP Holdings LP from 2009 to 2011. He was President, Chief Executive Officer & Director at Enterprise Products Operating LLC. He was President & Chief Executive Officer at Enterprise Products GP LLC from 1999 to 2011. He was President, Chief Executive Officer & Director at Enterprise Products Holdings LLC from 2010 to 2014 and in 2007. He was Chief Executive Officer & Director at Enterprise Products Partners LP from 2014 to 2015. He was Group Vice Chairman at EPCO, Inc. He was Director at Enterprise TE Partners LP. He was Director at Edge Petroleum Corp. from 2005 to 2010. He was Director at Enterprise Products Operating LP. He was Director at DEP Holdings LLC from 2006 to 2010. He was Director at Suncor Energy, Inc. He was Director at Enterprise Products Holdings LLC in 2010. He was Chief Financial Officer & Executive Vice President at Duncan Energy Partners LP from 2006 to 2010. Mr. Creel completed undergraduate studies at McNeese State University. |
| William Harold Spence |
William Harold Spence is currently Chairman at Corporate Leadership Council. He serves as Director at Arizona Public Service Co. since 2021 and Independent Director at Pinnacle West Capital Corp. since 2021. He has been an Independent Director at The Williams Cos., Inc. since 2016. He holds Director positions at Lafayette College, Lehigh Valley Partnership, Allentown Symphony Association, Inc., Valley Youth House of Allentown, and The Pennsylvania Society. He is a Non-Executive Director at Central Networks West Plc since 2015. He is a Trustee at Lehigh Valley Health Network, Inc. since 2018. Former roles include Non-Executive Chairman at PPL Corp. from 2020 to 2021. He was Director at Kentucky Utilities Co., Louisville Gas & Electric Co., PPL Electric Utilities Corp., Talen Energy Supply LLC, PPL UK Distribution Holdings Ltd., National Grid Electricity Distribution Network Holdings Ltd., Electric Power Research Institute, Inc., Edison Electric Institute, Inc., LG&E & KU Energy LLC, Institute of Nuclear Power Operations, Inc., Nuclear Energy Institute, United Way of the Greater Lehigh Valley, and WPD WEM Ltd. He was Director at National Grid Electricity Distribution Midlands Ltd. from 2015 to 2017. He served as Senior Vice President at Conectiv Power Delivery from 2000 to 2006. He was Vice President-Trading at Delmarva Power & Light Co. He was President at Pepco Holdings LLC from 2002 to 2006, and also held President roles at Pepco Energy Services, Inc. and Talen Generation LLC. Education includes an MBA from Bentley University and undergraduate studies at The Pennsylvania State University. |
| Rose M. Robeson |
Rose M. Robeson is currently Independent Chairman at NPK International, Inc. since 2023, Independent Director at The Williams Cos., Inc. since 2020, Independent Director at SM Energy Co. since 2014, Director at Juvenile Diabetes Research Foundation (Rocky Mountain), and Member of The American Institute of Certified Public Accountants, The Financial Executives Institute, and Colorado Society of Certified Public Accountants, Inc. Former roles include Director at Tesco Corp. from 2015 to 2017; Independent Director at Third Coast Midstream Holdings LLC and Third Coast Midstream LLC from 2014 to 2016; Independent Director at Antero Midstream Corp. from 2017 to 2022; Director at AMGP GP LLC from 2017 to 2019; Principal at Ernst & Young LLP; Chief Financial Officer & Vice President at Duke Energy Field Services LLC; Chief Financial Officer & Senior Vice President at DCP Midstream LP, DCP Midstream GP LLC, and DCP Midstream Partners LP from 2012 to 2014; Chief Financial Officer & Group Vice President at DCP Midstream LLC (Old) from 2009 to 2012; Treasurer & Vice President at Kinder Morgan, Inc. from 1996 to 2000; and Assistant Treasurer at Total Petroleum North America Ltd. in 1996. Education includes undergraduate studies at Northwest Missouri State University. |
| Carri Ann Lockhart |
Carri Ann Lockhart is Chief Executive Officer, Director & MD at Karoon Energy Ltd. since 2025. Ms. Lockhart is an Independent Director at The Williams Cos., Inc. since 2023. Ms. Lockhart is a Director at Offshore Rig Museum, Inc. Ms. Lockhart is a Director at Ascent Resources LLC. Former roles include Managing Director & Director at Fujairah Oil & Gas UK LLC. Ms. Lockhart was an Independent Director at Innovex International, Inc. from 2022 to 2026. Ms. Lockhart was an Independent Director at Dril-Quip, Inc. Ms. Lockhart was Executive VP-Technology, Digital & Innovation at Equinor ASA from 2020 to 2022. Ms. Lockhart was Regional Vice President-Eagle Ford at Marathon Oil Co. LLC. Education includes undergraduate studies at Montana Technological University (Montana). |
| Stacey H. Doré |
Stacey H. Doré currently serves as Independent Director at The Williams Cos., Inc. since 2021. Holds the position of Director at Texas Women's Foundation. Member of The International Women's Forum, National Association of Corporate Directors, The Dallas Assembly, and Women of Tocqueville. Trustee at Trinity Christian Academy (Texas). Since 2022, serves as EVP, Chief Strategy & Sustainability Officer at Vistra Corp. Former roles include President & Chief Executive Officer at Sharyland Utilities LP and Sharyland Utilities LLC. Director at Girls, Inc. Vice President & General Counsel at Luminant Holding Co. LLC. from 2008 to 2012. Principal at Vinson & Elkins LLP from 1997 to 2012. Executive Vice President & General Counsel at Energy Future Holdings Corp. from 2008 to 2016. Senior Vice President & General Counsel at Hunt Utility Services LLC. Senior Vice President & General Counsel at InfraREIT, Inc. from 2016 to 2019. SVP-Utility & Power Operations at Hunt Energy Corp. Education includes undergraduate degree from the University of Louisiana at Lafayette in 1993 and graduate degree from Harvard Law School in 1997. |
| Jesse J. Tyson |
Jesse J. Tyson is currently an Independent Director at The Williams Cos., Inc. since 2022. Mr. Tyson also serves as a Trustee at Benedict College and Lane College. Former positions include President, Chief Executive Officer & Director at National Black MBA Association, Inc. from 2012 to 2018, Director at United Way of Miami-Dade, Inc., and Director-Global Aviation at Exxonmobil Inter-America, Inc. from 2008 to 2011. Education includes undergraduate studies at Lane College and an MBA from The Ohio State University. |
| Peter A. Ragauss |
Peter A. Ragauss is currently an Independent Director at The Williams Cos., Inc. since 2016, an Independent Director at APA Corp. since 2014, and a Director at Alley Theatre, Baltic-American Freedom Foundation, and JSC Skulte LNG Terminal. Formerly, Mr. Ragauss was Chief Executive Officer at BP Products North America, Inc. from 2000 to 2003, Controller-Refining & Marketing at BP Plc from 2003 to 2006, Chief Financial Officer & Senior Vice President at Baker Hughes Holdings LLC and Baker Hughes Co. from 2006 to 2014, Vice President-Finance at El Paso Energy International Co. from 1996 to 1998, Vice President-Corporate Development at Tenneco Energy, and Vice President-Finance & Portfolio Management at Amoco Energy International. Education includes undergraduate studies at Michigan State University and an MBA from Harvard Business School. |
