Join a curated, high-impact community of senior leaders across the energy value chain. You'll connect with executives from oil, gas, power, and utilities; U.S. independents; policymakers and regulators; market analysts; investors; and technology innovators. With representation from every corner of the industry, this is a rare opportunity to expand your network, learn from diverse perspectives, and build relationships that spark ideas and action.
Bill founded Armstrong Oil & Gas, Inc., (AOG) a privately held oil and gas exploration
company headquartered in Denver, Colorado, in 1985 from the attic of his 100-year-old
garage/barn. He graduated in 1982 from Southern Methodist University. He left SMU with a
B.S. degree in geology, a Phi Beta Kappa key, and a wife that he met in Geology 101. After
spending time doing what one-man companies are ‘supposed to do’ - chasing deals in Kansas,
the DJ, the Permian, and other independent friendly regions - Bill shifted his efforts to internally
generating, assembling, and drilling large company impact exploration opportunities. By
seeking out top geologic, geophysical, land, and engineering talent, and also by pursuing big
potential “wildcats”, Bill created a unique business model in the energy sector that proved
successful for AOG and the companies with whom they worked and partnered.
Over the last forty-one years, AOG has been involved in the discovery of over twenty oil and
gas fields in a variety of geologic provinces that include the Williston Basin, Powder River
Basin, Wyoming/Utah Overthrust Belt, Green River Basin, Michigan Basin, Cook Inlet, Gulf of
Mexico, and San Joaquin Valley. Most recently Bill and his team have been active on the North
Slope of Alaska finding numerous 100+ million-barrel oil fields including one of the largest oil
fields in U.S. history, the 3+ billion-barrel Pikka Field.
Bill is a member and past chairman of the All-American Wildcatters. He also sits of the National
Petroleum Council. The American Association of Petroleum Geologists chose Bill as its Michel
T. Halbouty lecturer in 2018, then in 2020, Bill and his geologist, Jesse Sommer, received Norman
F. Foster Outstanding Explorer Award. In 2019 Bill and Jesse received the Michael S. Johnson
Explorer of the Year Award from the Rocky Mountain Association of Geologists. In 2019 Bill
was profiled in The Wall Street Journal as “One of the Last Wildcatters”. In 2021, Bill was named
the Wildcatter of the Year by the Western Energy Alliance. He is a recent inductee into the Oil
and Gas Hall of Fame by Oil and Gas Investor Magazine.
He and his wife, Liz, are active in numerous business ventures, investments, and philanthropies.
In 2004, they founded Epoch Estate Wines, an ultra-premium vineyard/winery operation located
in Paso Robles, California. Bill currently serves on the boards of Tourmaline Oil Corp.
(Calgary) and Southern Methodist University (Dallas) where in 2021, both he and his wife
received SMU’s Distinguished Alumni Award. Bill is a former board member of the Denver Art
Museum and is trustee emeritus at Colorado Ballet. Liz and Bill manage The Armstrong
Foundation which primarily focuses on education and arts philanthropy.

Alex Biholar is the Manager of Devon Energy Ventures, where he leads the company’s
corporate venture capital team and new energies projects. In this role, he identifies and
pursues strategic initiatives that strengthen Devon’s core oil and gas operations, while also
exploring strategic growth opportunities in emerging areas such as enhanced geothermal
systems.
Alex began his career as a Geophysicist at SandRidge Energy in 2011 and joined Devon
Energy in 2013, working across multiple U.S. onshore basins as a Geophysicist and later
serving as a Basin Advisor in the Delaware Basin Business Unit.
Alex holds a BS and a MS in Geosciences from The University of Texas at Dallas, as well as
an Executive MBA in Energy Management from the University of Oklahoma. An active leader
in the geoscience community, Alex has held several leadership roles, including President of
the Geophysical Society of Oklahoma City and Director of the Society of Exploration
Geophysicists Foundation. He resides in Oklahoma City with his wife and their three
children.

Robert Bryce is an author, journalist, film producer, and podcaster. He is the acclaimed author of six books on energy and innovation, including most recently, A Question of Power: Electricity and the Wealth of Nations. Bryce has given more than 400 invited or keynote lectures to groups ranging from the Marines Corps War College to the Sydney Institute as well as to a wide variety of associations, universities, and corporations. His books and articles have been translated into six languages. His work has appeared in dozens of publications including The Wall Street Journal, New York Times, Washington Post, Forbes, Real Clear Energy, The Hill, Austin Chronicle, and Guardian. Bryce has also appeared on numerous media outlets ranging from Fox News to Al Jazeera. He is the host of the Power Hungry Podcast and the co-producer of the feature-length documentary: Juice: How Electricity Explains the World, which is available on iTunes, Amazon Prime, and other streaming services. Bryce has also testified before the U.S. Congress six times, including three times in 2021. He lives in Austin, Texas, with his wife, Lorin, who is a photographer and master potter.

Jim Burke is Vistra’s president, chief executive officer, and a member of its board of directors. Vistra is a Fortune 500 integrated power generation and retail electricity company based in Irving, Texas, with operations across the U.S. from California to Maine. Burke has been with Vistra and its predecessor companies since 2004, serving in various leadership positions, including chief financial officer, chief operating officer, and as chairman and CEO of TXU Energy, the company’s retail subsidiary and leading competitive retailer in Texas.
Burke has worked in the retail electric market since 2000 in both the residential and commercial segments. Prior to joining TXU Energy, Burke held senior leadership positions at Gexa Energy and Reliant Energy.
Before his work in competitive electricity markets, Burke worked at The Coca-Cola Company, both
domestically in the juice division of The Minute Maid Company and internationally in the expansion
of the juice business through Coca-Cola Bottlers in Latin America, South Africa, and Hong Kong.
Before Coca-Cola, he was a management consultant for Deloitte & Touche Consulting.
Outside of his responsibilities at Vistra, Burke serves as a board member of the Nuclear Energy
Institute and the Institute of Nuclear Power Operations, as an energy advisory council member for
the Federal Reserve Bank of Dallas, and as an advisory board member for the Tulane University
Energy Institute. He is also a board member for the United Way Foundation of Metropolitan Dallas
and the Ursuline Academy of Dallas.
Burke is a graduate of Tulane University, earning a bachelor’s degree in economics and a master’s in
business administration in finance and general management. He is a licensed certified public
accountant and has also earned the designation as a chartered financial analyst.

John Casesa is Senior Managing Director at Guggenheim Partners, a global investment banking and asset management firm.
He was previously Group Vice President, Global Strategy at Ford Motor Company.
Prior to Ford, Casesa was one of Wall Street’s leading auto analysts for almost two decades, at Merrill Lynch and at Schroders. His thought-leading research changed the way investors understood
many aspects of the auto industry. He authored Car Wars, which remains a benchmark for measuring automaker competitiveness, and Who Makes the Car, which presented a new framework for understanding the supply chain. In 2005, his Energy Security & Climate Change foretold the clean car revolution that is playing out today.
He was ranked as an All-Star eleven times by Institutional Investor magazine and helped write
the New York Stock Exchange’s qualifying exam for securities analysts (Series 86).
Casesa started his career at General Motors.
He holds a BS from St. John’s University and an MBA from the Tuck School of Business at
Dartmouth College.

Steven Center brings more than four decades of experience in executive positions at
domestic and import brand automobile manufacturers and retail dealerships.
Presently, Steven serves as a Director on the Board of Managers of the Piston Group, a
large minority owned OE supplier, based in Detroit, MI. Piston supplies a large variety of
components to domestic and import brand auto manufacturers.
Previously, he served as the Chief Operating ODicer & Executive Vice President of Kia
America. In this role, he oversaw Automobile Sales (with nearly 800 Kia dealers within the
United States across five sales regions), as well as Service, Aftersales and Parts sales,
Marketing, and Customer Sales and Ownership Experiences. He joined Kia in January
2022.
Prior to joining Kia, Steven was a senior executive at American Honda Motor, Co., Inc. for
nearly 30 years, in leadership roles in automobile sales, marketing, product development
product regulatory, IT, as well as business development.
During his career, Steven has served on various boards of automotive trade associations
and charitable organizations, as well as lectured on topics including customer experience,
environmental policy, and database and marketing communications at New York
University, San Diego State University, Stanford University, and the University of Southern
California.
Steven earned a Master of Business Administration degree from the University of Southern
California and a Bachelor’s Degree in Economics and Business Administration-Finance
from the State University of New York at Albany.
He resides in Southern California and is a native of New York City.

Chief Executive Officer
Age: 59 | Director Since: January 2015 | APA Committees: None | Other Public Company Boards: None
Contributions to Our Board
Additional Leadership Experience, Service, and Qualifications
Career Highlights
APA Corporation, 1997-present

Helima is a Managing Director and the Head of Global Commodity Strategy and Middle East and North Africa (MENA) Research at RBC Capital Markets. She specializes in geopolitics and energy, leading a team of commodity strategists that cover energy, metals, and cross-commodity investor activity, as well as policy analysis and both Washington and global political insights. Helima is a member of the National Petroleum Council, a select group of individuals who advise, inform, and make recommendations to the Secretary of Energy with respect to any matter relating to oil and natural gas. She also is a CNBC contributor, a member of the channel’s exclusive family of experts. Helima is on the Board of Directors for the Atlantic Council, is a Life Member of the Council on Foreign Relations, and is on the Advisory Council for the Department of History at Princeton University. She is on the Board of Directors of Reservoir Media, Inc., the first female-founded and led publicly traded independent music company in the US. Helima joined RBC Capital Markets from Barclays, where she was a Managing Director and Head of North American Commodities Research. Prior to that, she worked in Lehman’s Business Intelligence Group, the Council on Foreign Relations, and the Central Intelligence Agency, where she focused on geopolitics and commodities. Helima
has received many industry accolades throughout her career and received her PhD in economic history from Princeton in 2001.

Ben Dell is a Managing Partner of Kimmeridge and oversees investment activity across the firm. He is closely involved in the screening of new geological opportunities and in the negotiation and execution of investment strategies.
Prior to founding Kimmeridge, Mr. Dell was a Senior Equity Research Analyst for Oil and Gas Exploration and Production (E&P) at Sanford C. Bernstein, where he was ranked first three times in the Institutional Investor Research Survey for coverage of E&Ps. Mr. Dell was also ranked for Natural Gas and for Oil Services and Equipment coverage. Mr. Dell joined Sanford C. Bernstein in 2003. Prior to joining Bernstein, Mr. Dell was employed at British Petroleum (BP) in its M&A and finance group. Before moving into the finance field, Mr. Dell also held positions as an exploration geologist and geophysicist across several of BP’s regional business units.
Mr. Dell is currently CEO of Chestnut Carbon, a nature-based carbon removal developer and is on the Board of Caturus HoldCo, LLC., a large private natural gas producer in South Texas. He previously held positions as Chairman of the Board and interim CEO of Civitas Resources, Inc. (“Civitas”), a company that formed from the merger of Extraction Oil & Gas, Inc. and Bonanza Creek Energy, Inc. Mr. Dell earned an undergraduate degree and a master’s degree in Earth Sciences from St. Peter’s College, Oxford.

Co-President, Chief Legal Officer and Head of M&A
Mr. Erman joined Matador Resources Company in January 2016 as its Co-General Counsel. In August 2016, Mr. Erman was promoted to Vice President and Co-General Counsel. He became Senior Vice President and Co-General Counsel in July 2018. In March 2022, Mr. Erman became Senior Vice President and General Counsel and in October 2022, Mr. Erman was promoted to Executive Vice President and General Counsel and Head of M&A. In June 2025, Mr. Erman was promoted to Co-President, Chief Legal Officer and Head of M&A.
Prior to joining Matador, Mr. Erman was a Partner at Carrington, Coleman, Sloman & Blumenthal, L.L.P. in Dallas, having joined the firm in 2010. From 2003 to 2010, he was an associate in the Dallas and Washington, D.C. offices of Baker Botts L.L.P. Mr. Erman’s practice focused on litigation matters, including oil and natural gas, securities and other commercial litigation, as well as corporate governance matters. Before attending law school, Mr. Erman worked for Oklahoma Governor Frank Keating.
Mr. Erman received a Bachelor of Arts degree in Political Science in 1999 from the University of Oklahoma. He received his law degree in 2003 from Southern Methodist University Dedman School of Law, where he graduated cum laude and was a Hatton W. Sumners Scholar, a member of the Order of the Coif and an Articles Editor on the SMU Law Review.

Donald L. Evans was appointed as the 34th U.S. Secretary of the Commerce in 2001 by President George W. Bush, where he served until 2005. He was a strong advocate for the free-enterprise system, free and fair-trade agreements, and responsible corporate stewardship. To encourage job creation, Evans worked closely with President Bush to reduce taxes, open markets for American goods and services, and promote a level playing field abroad. A trusted friend and advisor for more than four decades, Evans worked on President Bush’s successful Texas gubernatorial campaigns in 1994 and 1998 and served as Chairman of the 2000 Bush-Cheney Presidential Campaign.
Currently, Evans serves as Chairman of the George W. Bush Foundation, Chairman of the Permian Basin Medical Center, Chairman Emeritus of the Permian Strategic Partnership, and as senior advisor at Energy Capital Partners. From 2007-2018, Evans served as the Chairman of Energy Future Holdings Company, formerly TXU Energy. Before joining the Bush Administration, for 15 years, he was the CEO of Tom Brown, Inc., a publicly owned energy company.
In 1995, Evans was appointed to the University of Texas Board of Regents, serving as Chairman from 1997 to 2001. In 2002, he was named a University of Texas Distinguished Engineering Alumnus, inducted into the University of Texas’ McCombs School of Business Hall of Fame, and named a Distinguished Alumnus of The University of Texas at Austin. In 2014, Evans was inducted as a Texas Business Hall of Fame Legend and was a 2019 inductee of the Texas Athletics Hall of Honor.
Evans attended the University of Texas at Austin, receiving a B.S. degree in mechanical engineering in 1969 and an M.B.A. in 1973. His passions in life are his faith, family, and friends. Don and his wife, Penny, share a family of 6 children and 7 grandchildren. They reside in Dallas.

Steve Greenfield is General Partner of Automotive Ventures, an early-stage automotive technology and mobility VC fund that helps entrepreneurs raise growth capital and accelerate their businesses, and delivers outsized returns to investors in the fund.
Steve has more than 25 years of experience in the automotive technology space. He started his career in 1999 selling software to car dealers and has overseen more than $1 billion in automotive technology acquisitions.
Steve served as TrueCar’s Senior Vice President of Strategy and Business Development, and AutoTrader.com’s Vice President of Product Management and Business Development, overseeing the acquisitions of vAuto, Kelley Blue Book, HomeNet Automotive, VinSolutions, and DealerScience.
Earlier in his career, Steve served as Manheim’s Director of International Development, spearheading Manheim’s overseas investments, including establishing new joint ventures in Dubai, Istanbul and Beijing.
He is the author of two books: "The Future of Automotive Retail," and "The Future of Mobility." He is also the author of the Weekly "Intel Report."
For fun, he likes to ride his three motorcycles on the racetrack and hang out with his fourteen rescue cats.

Kenneth A. Hersh is chairman of his family investment office, HFI Capital Management, which invests across the economy with an emphasis on the industrial, financial, energy, real estate and technology sectors.
From 2016 to 2025, he served as President and CEO of the George W. Bush Presidential Center, a Dallas-based non-partisan institution which houses the George W. Bush Presidential Library and Museum and the George W. Bush Institute. Under his leadership, the Bush Center implemented its long-term strategic plan, enhanced the influence and reach of the Bush Institute, expanded its public programming, assumed operations of the Bush Museum from the National Archives, and ensured long-term sustainability by increasing its endowment seven-fold to over $420 million. He remains on the Bush Center’s Board of Directors. In 2025, he received D CEO magazine’s highest honor, its Corporate Citizenship Legacy Award for his civic leadership.
He made his mark in the private sector dating back to 1988 as the Co-Founder and CEO of NGP Energy Capital Management, one of the nation’s largest natural resources private equity investment firms, which pioneered private equity investing in the sector. The firm has managed over $20.0 billion of cumulative committed capital since inception. Under his leadership from 1988 until 2016, NGP invested over $12 billion and achieved a 27-year annual rate of return of 30%, making it one of the nation’s leading investment firms. In 2023, the Oil and Gas Investor magazine inducted him into its Hart Energy Hall of Fame as one of the top 50 “who have shaped energy over the last half century.”
During 2012 through 2023, he was a Strategic Advisor to the Carlyle Group where he served at different times on the firm’s Management Committee and investment committees of its natural resources platforms.
Among other recognition, in 2024 he was inducted into the Horatio Alger Association of Distinguished
Americans honoring his perseverance and achievement. In 2023, he received the Ernest C. Arbuckle Award — Stanford’s Graduate School of Business highest honor recognizing excellence in management leadership.
Ken is also involved in the nonprofit arena personally and through the efforts of the Hersh Foundation. He sits on the boards of the Global War on Terrorism Memorial Foundation, the Texas Rangers Baseball Club, and numerous other civic organizations. He is a member of the Council on Foreign Relations.
In addition, Ken serves on the Executive Committee of Hoover Institution’s Board of Overseers and the Dean’s Advisory Council of Stanford’s Graduate School of Business. In 2023, he became the inaugural Distinguished Executive in Residence at SMU’s Cox School of Business.
In 2023, he released his book, The Fastest Tortoise: Winning in Industries I Knew Nothing About, which chronicles his life’s lessons evolving from his many business and personal experiences.
Ken began his career at Morgan Stanley & Co. where he was a member of the firm’s energy investment banking group. He graduated Princeton University, magna cum laude, with a degree in Politics in 1985. In 1989, he earned his M.B.A. from Stanford University’s Graduate School of Business, graduating as an Arjay Miller Scholar.

Chris is currently a director at California Resources, NOV, and Range Resources, and is a member of the Advisory Board of SMU’s Maguire Energy Institute. He has more than 36 years of experience in the global oil and gas industry, including as a director, President, and Chief Executive Officer of Denbury Inc. prior to its acquisition by Exxon Mobil Corporation in November 2023. Prior to joining Denbury, Mr. Kendall was with Noble Energy, serving as the Senior Vice President, Global Operations Services. During his 14-year tenure at Noble Energy, Mr. Kendall held several international and domestic leadership roles, primarily in the Eastern Mediterranean, Latin America, and the Gulf of Mexico regions. Mr. Kendall began his energy career at Mobil Corporation in 1989. He received a Bachelor of Science in Engineering, Civil Specialty from the Colorado School of Mines and graduated from Harvard Business School’s Advanced Management Program.

CFO with 30+ years of experience in Oil & Gas, Commodities, Supply & Trading, M&A, Business Development, Restructuring, Financing, Strategy, Risk Management and Private Equity.
Armand worked more than 24 years for Royal Dutch Shell, in Trading, Supply, M&A and increasingly senior positions of its Finance function. During his time in Finance, he was CFO for the Projects & Technology unit (2007-2010) and CFO for the global Supply & Trading business (2014-2016).
During 2017-2018, Armand was Group CFO and General Counsel for Louis Dreyfus Company, where he was leading divestments, corporate restructuring, (re)financing and litigation. He was also heavily involved in restructuring its listed Brazilian sugar operations (Biosev) and growing the business through JVs in China.
In December 2018, Armand was appointed CFO of Neptune Energy Group, owned by China Investment Corporation (CIC), CVC Capital and Carlyle. Armand managed the Finance function, was the driving force behind the Finance/IT organisation, growth of the business and completion of the sale of Neptune Energy Group to Eni Group and Var Energi (Q1-2024).
In May 2024, Armand joined MidOcean Energy (an EIG Global Energy Partners company) as Group CFO, to build and grow a 'pure play' global LNG business.
Armand has significant executive and non-executive experience on Boards, Audit, Remuneration & Nomination Committees of a global multinational, family-owned businesses, PE/SWF owned multinationals, a non-profit organisation and start-up businesses.
Armand holds an MBA from Maastricht University, a Masters in Finance from London Business School and he is a Certified Internal Auditor. He is also an alumnus of the Executive Leadership Program of IMD.

Robert (“Bob”) McNally is the founder and president of Rapidan Energy Group.
Bob's 34-year career includes service as a White House energy advisor to President George W. Bush, an oil market analyst, and a hedge fund strategist at Tudor Investment Corporation. His acclaimed book Crude Volatility: The History and the Future of Boom-Bust Oil Prices (Columbia University Press, 2017) received the Honorable Mention in Economics in the 2018 PROSE Awards; the 2023 IAEE Marcel Boiteux Best International Energy Economics Book Award; and the 2024 USAEE Adelman-Frankel Award for unique and innovative contribution to the field of energy economics.
Leading media outlets regularly interview Bob, who frequently testifies before Congress on energy markets and national security.
From 2001 to 2003, he served as Special Assistant to the President on the White House National Economic Council and, in 2003, Senior Director for International Energy on the National Security Council.
Bob earned his B.A./B.S. in Political Science and International Relations from American University and his M.A. in International Economics and Foreign Policy from Johns Hopkins School of Advanced International Studies (SAIS).

Ms. Margaret “Meg” Molleston has more than forty years of experience in the oil and gas
industry. She currently serves as President and Chief Executive Officer of GeoSouthern Energy
Partners GP, LLC (“GeoSouthern”) and GEP Haynesville II, LLC (“GEP”). Prior to joining
GeoSouthern Energy Corporation as its Vice President and Chief Operating Officer in June 2006,
Ms. Molleston held positions with Anadarko Petroleum Corporation, Union Pacific Resources
Company, Weber Energy Corporation, the Sun Oil Company and worked with her family’s
businesses in southern Arkansas.
Under Meg’s leadership, GeoSouthern and GEP have played an important role in the Shale
Revolution, identifying, developing and monetizing key assets in the Eagleford and Haynesville
Shales.
In 2014, GeoSouthern sold its Eagleford assets to Devon Energy for $6 billion, and the transaction
was recognized by the Oil and Gas Investor as “Deal of the Year.”
Following the sale of its Eagleford assets, the company purchased 112,000 net acres and 300 wells
in Louisiana’s core Haynesville Shale, which it sold in November 2021 to Southwestern Energy
for a headline price of $1.85 billion. And most recently, in October 2025, GEP II sold its South
Mansfield acreage block in North Louisiana to Japan’s largest power producer, JERA, for $1.5
billion. The company continues to be consistently ranked in the top tier of privately held oil and
gas companies in the United States and currently drills and operates wells in Texas and Louisiana.
Ms. Molleston graduated magna cum laude with a Bachelor of Arts degree from Southern
Arkansas University and holds a Juris Doctorate Degree from the University of Arkansas at
Fayetteville. She is an active member of the Arkansas Bar Association and the American
Association of Professional Landmen. Ms. Molleston also serves on the SMU Cox Maguire
Energy Institute Advisory Board and the Business Advisory Council of the Rankin College of
Business at Southern Arkansas University.
Ms. Molleston was born and raised in Magnolia, Arkansas and currently resides in the Houston
area with her husband, Jed.

Christopher M. Paulsen joined USA Compression as Vice President, Chief Financial Officer and Treasurer in November 2024 and was named Senior Vice President in January 2026. Prior to joining the company, Mr. Paulsen was Senior Vice President of Business Development and Strategy for Pioneer Natural Resources Company, a large independent oil and gas exploration and production company he joined in 2002. He was involved in various functions over 22 years at Pioneer, including mergers and acquisitions, negotiations, strategy, marketing, investor relations, subsurface, operations and energy transition. Prior to Pioneer, he held planning and treasury roles with SBC Communications. Mr. Paulsen received his B.B.A. from Baylor University and his M.B.A. from the McCombs School of Business at the University of Texas.
Chris serves on the Advisory Boards for Spindletop Energy Fund and Maguire Energy Institute in the SMU Cox School of Business.

Tim Perry is the Vice Chairman of the Global Energy Group at RBC Capital Markets. Based in Houston, he has a client focus primarily composed of US Independents (public and private ownership), both US and International Majors, LNG companies, and certain Energy Transition companies (carbon capture and geothermal businesses). Mr. Perry has worked on numerous transactions in m&a and capital markets during his 30+ year career in investment banking. Prior to joining RBC in 2023, he had a 25-year tenure in the Investment Bank at Credit Suisse, where he was the Global Head of the Energy and Transition Group and was a member of the Bank’s Operating and Capital Markets Underwriting Committees.
In addition to his responsibilities at RBC Capital Markets, Mr. Perry is also the Chairman of the Maguire Energy Institute in the Cox School of Business at SMU. At SMU, he Co-Founded Spindletop, a student-led energy focused investment fund. He holds a BSBA degree from the University of Arkansas (Fayetteville) and a MBA degree from Vanderbilt University.

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