Greg Garland is chairman and CEO of Phillips 66, a diversified energy manufacturing and logistics company. A chemical engineer, Garland has 40 years of industry experience in technical and executive leadership positions within the oil and natural gas and chemicals industries.

Previously, Garland had served as senior vice president, Exploration and Production, Americas, for ConocoPhillips since 2010. Prior to joining ConocoPhillips, Garland was president and chief executive officer of Chevron Phillips Chemical Company, which is now a joint venture between Phillips 66 and Chevron. Before his election to that position, Garland served Chevron Phillips as senior vice president, Planning & Specialty Chemicals. His prior experience includes serving as general manager of Qatar/Middle East for Phillips, a position he assumed in 1997. From 1995 to 1997, he served as general manager of natural gas liquids after serving as manager of planning and development in planning and technology. From 1992 to 1994, he was manager of the K-Resin® business unit.

Garland began his career with Phillips in 1980 as a project engineer for the Plastics Technical Center. He later worked as a sales engineer for Phillips' plastics resins, business service manager for advanced materials, business development director, and olefins manager for chemicals.

He is the chairman and CEO of Phillips 66 Partners. He serves on the board of directors for Phillips 66 Partners, DCP Midstream, Amgen, the Barbara Bush Houston Literacy Foundation, the Greater Houston Partnership, Junior Achievement for Southeast Texas, and the National Petroleum Council. He is chairman of American Petroleum Institute and a member of the engineering advisory board for Texas A&M University. He is also one of the founding CEOs of the American Cancer Society’s CEOs Against Cancer initiative in the U.S. Gulf Coast region and a member of the Board of Visitors for MD Anderson.

Garland received a Bachelor of Science degree in chemical engineering from Texas A&M University in 1980.

Jeff Dietert is vice president, Investor Relations, for Phillips 66. 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. Prior to that, he also 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, Health, Safety and Environment (HSE) and Projects for Phillips 66, a diversified energy manufacturing and logistics company. A chemical engineer, Erfert has 30 years of experience in various refining and leadership roles within the oil and gas industry.

Previously, Erfert served as vice president, Strategy and Planning; general manager, Sweeny Refinery; and manager, Refining Business Improvement. Prior to these roles, he was manager of the Bayway Refinery and manager of the Trainer Refinery for ConocoPhillips. Before this, Erfert served as operations manager at the Bayway Refinery. From 2005 to 2008, he held the role of production manager at the 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 board of the Western States Petroleum Association, the ManCom for WRB Refining LP, the University of Houston Engineering Leadership Board and the American Red Cross of Greater Houston. He is also on the Operating Excellence Committee for DCP Midstream and CPChem. Erfert previously served as chairman of the API Refining Subcommittee and the AFPM Process Safety Advisory Group.

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 senior vice president, chief digital and administrative officer for Phillips 66. Golodryga has more than 30 years of experience within the oil and gas industry.

Before joining Phillips 66 in April 2017, 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.

Robert (Bob) Herman is executive vice president, Refining for Phillips 66, a diversified energy manufacturing and logistics company. He has more than 35 years of experience in various technical and leadership roles within the oil and gas industry.

Herman previously served as executive vice president, Midstream, as well as senior vice president, Health, Safety & Environment (HSE), Projects and Procurement. He joined Phillips 66 as senior vice president, HSE, and previously worked for ConocoPhillips as vice president, HSE. While with ConocoPhillips, he spent a majority of his career on the refining side of the business. Herman was named president, Refining, Marketing and Transportation - Europe, in 2008 after serving as general manager, Refining Business Improvement, since 2005. His extensive work with several refineries across the U.S. and Europe included a three-year term as the refinery manager of the Bayway Refinery.

Herman began his career in 1982 as a rotating equipment engineer at Prudhoe Bay, Alaska, with Sohio Alaska Petroleum Company. In 1987, he transferred to refining and worked in numerous operations, maintenance, turnaround, project management, technical support and refining management roles for BP, Tosco, Premcor and ConocoPhillips. 

He is the vice president for Phillips 66 Partners GP LLC. He currently serves on the board of directors for Phillips 66 Partners and Chevron Phillips Chemical Company. He is a past board member of the Northwest Construction Consumers Council; Europia, the European petroleum industry association; CONCAWE, the European consortium for health, safety and environmental issues in the petroleum industry; and Boys & Girls Clubs of Greater Houston.

Herman was born in Seattle, Washington, in 1959 and received a Bachelor of Science degree in mechanical engineering from Washington State University in 1982.

Mark Lashier is president and chief operating officer of Phillips 66, a diversified energy manufacturing and logistics company. A chemical engineer, he has over 30 years of experience in various executive leadership roles within the energy industry.

Lashier served as president and CEO of Chevron Phillips Chemical Company LLC (CPChem), a joint venture between Phillips 66 and Chevron, from 2017 to 2021. Prior to that role, he 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 of Saudi Arabia; and regional manager of Asia.

Lashier began his career at Phillips Petroleum in 1989 as an associate research engineer in the chemicals group of Research and Development.

He serves on the boards of several industry groups and nonprofits, including American Fuel and Petrochemical Manufacturers, the American Chemistry Council, the Society of Chemical Industry, Iowa State University’s College of Engineering Industrial Advisory Council, the Alliance to End Plastic Waste, Junior Achievement of Southeast Texas and the American Cancer Society’s CEOs Against Cancer.

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

Brian Mandell is executive vice president, Marketing and Commercial for Phillips 66, a diversified energy manufacturing and logistics company. Mandell has more than 29 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 for DCP Partners Midstream, 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, Finance, and chief financial officer for Phillips 66, a diversified energy manufacturing and logistics 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 on the board of directors for Phillips 66 Partners, Chevron Phillips Chemical Company and DCP Midstream, LLC.

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

Ann M. Oglesby is vice president, Energy Research & Innovation for Phillips 66, a diversified energy manufacturing and logistics company. She has more than 30 years of experience in the oil, natural gas and petrochemicals industries.

Prior to assuming her current role in January 2018, Oglesby was general manager, Global Risk & Compliance. She previously served as general manager, Lubricants, in addition to vice president, Communications & Public Affairs. She also led Communications & Public Affairs at ConocoPhillips from 2010-12. In her tenure with ConocoPhillips, she was general manager, Corporate Planning and Strategy, from 2009-10; manager, Climate Change and Sustainable Development, from 2007-09; president, Specialty Products, from 2004-07; and manager, Emerging Technology, from 2001-04.

Oglesby began her oil industry career in 1987 with various roles in engineering, supply, business development and planning positions focused on petrochemicals.

Oglesby currently serves as the Phillips 66 executive liaison for Oklahoma State University and is a member of the OSU Diversity Development Council. She is also a board member of the National Action Council for Minorities in Engineering and serves on the Frank Phillips Foundation board of trustees.

Originally from Fort Smith, Arkansas, Oglesby earned a Bachelor of Science degree in chemical engineering from Oklahoma State University in 1987.

Sonya Reed is senior vice president, Human Resources and Corporate Communications for Phillips 66. 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, corporate brand, media and philanthropy. Reed is a member of the company’s Executive Leadership Team and reports directly to Greg Garland, chairman and CEO.

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 Boys & Girls Clubs of Greater Houston and The Awty International School. She previously served on the board of 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, Midstream for Phillips 66, a diversified energy manufacturing and logistics 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 CPChem and Qatar Petroleum joint venture, 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 leadership positions.

Roberts serves on the board of directors for Phillips 66 Partners and the Houston Zoo. He has a Bachelor of Science in marketing from Ball State University.

Vanessa Allen Sutherland is executive vice president, Legal and 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.