Mark Lashier is President and CEO of Phillips 66, a diversified energy company. A chemical engineer, he has over 30 years of experience in various executive leadership roles within the energy and petrochemical industries.

Lashier served as Chief Operating Officer of Phillips 66 from April 2021 through June 2022. Before that, he was President and CEO of Chevron Phillips Chemical Company LLC (CPChem), a joint venture between Phillips 66 and Chevron, from 2017 to 2021. He previously held several leadership positions at CPChem, including Executive Vice President of Olefins and Polyolefins; Senior Vice President of Specialties, Aromatics and Styrenics; Vice President of Corporate Planning and Development; Project Director for Saudi Arabia; and Regional Manager in Asia.

Lashier began his career at Phillips Petroleum in 1989 as an Associate Research Engineer.

He serves on the boards of several industry groups and nonprofits, including American Fuel and Petrochemical Manufacturers, the Greater Houston Partnership, Iowa State University’s College of Engineering Industrial Advisory Council, Junior Achievement of Southeast Texas and the American Cancer Society’s CEOs Against Cancer. He also serves on the executive committee of American Petroleum Institute and is a member of the Business Roundtable, the Business Council, and the National Petroleum Council.

Lashier received a Bachelor of Science and a doctorate in chemical engineering from Iowa State University. He holds 13 U.S. patents.

Todd Denton is Senior Vice President of Health, Safety and Environment (HSE) and Field Operations Support for Phillips 66, a diversified energy company. Denton has more than 30 years of experience in the oil and gas industry, with an extensive background in pipeline and terminal projects and operations.

Before his current role, Denton held a series of leadership positions in Midstream for Phillips 66, most recently as Vice President of Midstream Operations.

Denton previously worked for NuStar Energy as Vice President, Pipeline & Terminal Operations. He spent the majority of his early career with Diamond Shamrock and Valero in various engineering positions related to pipeline and terminal projects.

He serves on the board of directors of DCP Midstream, LP, and the Liquid Energy Pipeline Association (LEPA). He is one of five industry executives on the U.S. Department of Transportation Technical Advisory Committee, appointed by Secretary of Transportation Elaine Chao in 2017. Denton also serves on the board of directors of the American Red Cross Greater Houston chapter.

Denton earned a Bachelor of Science degree in Electrical Engineering from Texas Tech University in 1986. He later earned a Master of Science degree in Finance and Economics in 1996 from West Texas A&M University.

Jeff Dietert is Vice President of Investor Relations for Phillips 66, a diversified energy company. Dietert brings over 30 years of experience in the oil and gas industry.

Before joining Phillips 66 in April 2017, Dietert served as Managing Director, Research, at Simmons & Company International, a firm that provides investment banking services for the energy industry. He served as Head of equity research and provided research coverage of companies in the integrated oil, natural gas gathering, processing and pipeline, and independent power sectors. He also previously served in business development, finance and marketing roles at Texaco, Aquila Energy and Oryx Energy, as well as a drilling engineer at Viersen & Cochran.

Dietert holds a bachelor’s degree in petroleum engineering from the University of Oklahoma and an MBA from the University of Texas at Austin.

David Erfert is Senior Vice President and Chief Transformation Officer for Phillips 66, a diversified energy company. A chemical engineer, Erfert has 32 years of experience in various refining and leadership roles within the oil and gas industry.

Previously, Erfert served as Senior Vice President of Health, Safety and Environment (HSE) and Projects for Phillips 66. He held a number of roles in the company prior to that, including Vice President, Strategy and Planning; General Manager, Sweeny Refinery; Manager, Refining Business Improvement; and Manager, Bayway Refinery. Before moving to Phillips 66 in 2012, his roles at ConocoPhillips included Manager, Trainer Refinery; Operations Manager, Bayway Refinery; and Production Manager, Ponca City Refinery. During the merger of Conoco and Phillips in 2002, he was transferred to the San Francisco Refinery as the Technical Manager.

Beginning his career with Shell Oil in 1990, Erfert held various roles in engineering as well as planning and economics. He later worked in the Netherlands for Shell International in a long-range planning and commercial role. He also served as Business Manager at Wood River Refinery and joined Tosco to serve as the Operations Manager for offsites.

Erfert is on the Management Committee for WRB Refining LP. He previously served as Chairman of the API Refining Subcommittee, Chairman of the AFPM Process Safety Advisory Group and on the board of the Western States Petroleum Association.

Erfert received a Bachelor of Science degree in chemical engineering from the University of Michigan in 1990. He earned his MBA in finance from the University of Houston in 1997.

Zhanna Golodryga is Executive Vice President of Emerging Energy and Sustainability for Phillips 66, a diversified energy company. She has more than 30 years of experience within the oil and gas industry.

Golodryga previously served as Senior Vice President and Chief Digital and Administrative Officer for Phillips 66 from April 2017 through September 2022.

Before joining Phillips 66, she served as Chief Information Officer and Senior Vice President, Services, with responsibilities for Global Supply Chain, Facilities and Office Services for Hess Corporation, a role she held since 2012. Prior to that, she was Vice President and CIO at BHP Billiton, Vice President of Information Technology at TeleCheck International, Manager of Information Systems at Baker Hughes, and IT Services Manager at Marathon Oil.

Golodryga graduated with a master’s degree in mechanical engineering from Kiev Engineering and Construction Institute in the Ukraine.

Richard G. (Rich) Harbison is Executive Vice President of Refining for Phillips 66, a diversified energy company. Harbison has over 30 years of experience in a variety of leadership roles across the refining, pipeline and terminal organizations.

From 2020 to 2022, Harbison was Vice President of the San Francisco Refinery, where he oversaw Rodeo Renewed. He previously served as Manager of the Lake Charles Manufacturing Complex from 2016 to 2020 and Manager of the Ferndale Refinery from 2014 to 2016. Prior to that, he worked at both the Los Angeles Refinery and Ferndale Refinery as Operations Manager.

Harbison began his career as an operator with Unocal Corporation at the Richmond Terminal. In 1992, he was promoted to his first supervisory role and worked in roles of increasing responsibility for the pipeline and terminal organizations.

In 1999, Harbison transferred to Tosco’s San Francisco Area Refinery as a project engineer. He worked on several assignments at the Rodeo Refinery, including routine maintenance, turnaround and operations superintendent.

Harbison was born in Napa, California, and received a Bachelor of Science degree in industrial studies from San Jose State University in 1988.

Brian Mandell is Executive Vice President of Marketing and Commercial for Phillips 66, a diversified energy company. Mandell has more than 30 years of experience in various Marketing, Commercial and Midstream roles.

Previously, Mandell served as Senior Vice President, Commercial; President, Global Marketing; and Global Trading Lead, Clean Products, Commercial. Prior to joining Phillips 66 in May 2012, he worked for ConocoPhillips as Manager, U.S. Gasoline Trading. There, Mandell served in the Commercial NGL group and was named Manager of NGL Trading after working as Manager of Processing Assets and Business Development.

Mandell began his career with Conoco in 1991 working in various Marketing roles across the U.S. In 1998, he transferred to the Commercial organization as a Market Analyst and subsequently worked in a variety of trading roles, including derivatives and clean products trading.

He serves on the board of directors of DCP Midstream, LP, Big Brothers Big Sisters of Greater Houston and Child Advocates. He previously served on the boards of the Fuels Institute and The Petrochemical Feedstock Association of the Americas.

Mandell attended the University of Texas at Austin and graduated with a Bachelor of Arts in 1986 and an MBA in 1990.

Kevin J. Mitchell is Executive Vice President and Chief Financial Officer for Phillips 66, a diversified energy company. Mitchell leads the company’s treasury, accounting, auditing, tax, corporate strategy and business development functions. He has more than 30 years of experience in finance roles within the oil and gas industry.

Mitchell previously served as Vice President, Investor Relations. Prior to joining Phillips 66, Mitchell served as the General Auditor of ConocoPhillips and Vice President, Exploration and Production — Strategy, Administration and Technical Services. 

He joined Conoco in 1991 and held positions in finance and accounting, including General Manager of Upstream Finance, Strategy and Planning; Vice President of Finance and Administration for ConocoPhillips Alaska; and Manager of Treasury Services.

Mitchell serves as chairman of the board of directors of DCP Midstream, LP.

He is a certified internal auditor and a fellow with the Chartered Institute of Management Accountants.

Tandra (Jackson) Perkins is Senior Vice President and Chief Digital and Administrative Officer for Phillips 66, a diversified energy company. She has nearly 30 years of professional experience across multiple industries, including energy and chemicals, industrial manufacturing and health care.

Before assuming her current role in October 2022, Perkins was Vice Chair of Growth and Strategy for KPMG in the U.S., an audit, tax and advisory professional services firm. She held several leadership roles within KPMG during her 21-year tenure, including Managing Partner for its Houston Major Market.

Perkins is a member of the Board of Directors for the United Way of Greater Houston and has served on numerous nonprofit boards, including Louisiana State University’s Dean Advisory Council, Women Corporate Directors, Greater Houston Partnership, CEOs Against Cancer, Houston Zoo, Ronald McDonald House of Houston, and Central Houston.

Among other honors, Perkins received the 2019 Impact Award from the National Black MBA Association and is a Greater Houston Women’s Chamber of Commerce Hall of Fame Inductee for 2019.

Perkins earned a Bachelor of Science degree in accounting from Louisiana State University and an MBA in information systems from the University of Houston. She is a Certified Information Systems Auditor.

Sonya Reed is Senior Vice President and Chief Human Resources Officer for Phillips 66, a diversified energy company. Reed is responsible for talent acquisition, total rewards, employee development, succession management, inclusion and diversity, and all other aspects of the human resources agenda for the company. She is also responsible for overseeing internal and external communications, community relations, media and social impact.

Before joining Phillips 66 in May 2015, Reed served as Executive Vice President and Chief Human Resources Officer for General Cable, an industrial manufacturing company, where she led the globalization of all human resources practices.

Reed has more than 20 years of global experience in human resources management, spanning across multiple industries. She began her career at Zurich Financial Services as a commercial underwriter and found her passion early on when she moved to human resources. She ascended through the function, specializing in business partnerships. After a multiyear assignment at Zurich’s global headquarters in Switzerland, she returned to the United States as the Vice President of Human Resources for Latin America, after which she moved to General Cable.

She is a board member of DistributionNOW, a leading global supplier of energy and industrial solutions, products and engineered equipment packages. She is also a board of trustee of The Awty International School. She previously served on the boards of Boys & Girls Clubs of Greater Houston and Girls Inc. of Greater Houston.

Reed holds a Bachelor of Arts degree in economics from Arizona State University and completed advanced studies at Cambridge University in England and the Complutense University of Madrid. She is fluent in Spanish.

Timothy (Tim) Roberts is Executive Vice President of Midstream and Chemicals for Phillips 66, a diversified energy company. Roberts has more than 30 years of experience in strategy, operations, commercial, and joint ventures in the oil and gas and chemicals industries.

Roberts previously served as Executive Vice President, Marketing and Commercial, as well as Executive Vice President, Strategy and Business Development. Prior to Phillips 66, Roberts was Executive Vice President, Global Olefins and Polyolefins for LyondellBasell.

He began his career in sales and in 1987 joined Phillips Petroleum, where he held positions in sales, marketing and corporate planning. Roberts subsequently moved to Qatar Chemical Company, a joint venture between Chevron Phillips Chemical Company LLC and Qatar Petroleum, as the Country Manager based out of Qatar.

After several leadership roles with CPChem, he was appointed President and CEO of Americas Styrenics, a Dow Chemical and CPChem joint venture. After serving as the Vice President of Corporate Planning and Strategic Transactions for CPChem, Roberts transitioned to LyondellBasell where he held various executive leadership positions.

Roberts currently serves on the board of directors for CPChem and previously served on the board for Phillips 66 Partners LP. He also is on the board of directors for the Houston Zoo.

Roberts has a Bachelor of Science in marketing from Ball State University.

Vanessa Allen Sutherland is Executive Vice President of Government Affairs, General Counsel and Corporate Secretary for Phillips 66, a diversified energy company. She has over 25 years of legal experience.

Before assuming her current role in January 2022, Sutherland was Executive Vice President and Chief Legal Officer for Norfolk Southern Corporation, where she held a series of positions.

Sutherland brings considerable knowledge of the public sector, having served as Chairperson and CEO of the U.S. Chemical Safety and Hazard Investigation Board from 2015-2018 and as Chief Counsel at the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration from 2011-2015. She also served in senior legal counsel roles for Altria Group and Philip Morris USA.

Sutherland earned a bachelor’s degree from Drew University, as well as a law degree and MBA from American University.