Board of Directors

Our Board’s composition is carefully considered by the Corporate Governance and Nominating Committee to ensure diversity in the broadest sense – of culture, background, outlook, experience, and tenure to bring together multiple, complementary perspectives. Our Directors bring a powerful range of skills and experience in relevant areas, including finance, exploration and production, environment, public policy, international business and leadership, as well as oilfield services.

This unique and highly impactful cross-section of capabilities enables our Board to help guide the Company’s strategic objectives and lead corporate governance practices. Further, while each member of our Board has held significant leadership positions in their respective professional fields, of equal importance is each Director’s personal ethics and integrity. Each of our Directors embodies the highest degree of personal and professional standards arming them with the qualified insights to deliver sustainable shareholder value.

William E. Macaulay

Executive Chairman, First Reserve


Mr. Macaulay is the Executive Chairman of First Reserve. He has been with First Reserve, a global private equity and infrastructure investment firm focused on the energy industry, since 1983. Mr. Macaulay is jointly responsible for supervision of the firm’s investment program and strategy, as well as overall management of the firm.

Mr. Macaulay sits on all of the firm’s investment committees. Mr. Macaulay served as a director of Weatherford Enterra from October 1995 to May 1998. Mr. Macaulay also served as Director of Corporate Finance for Oppenheimer & Co., Inc., where he worked from 1972 to 1982.

Previously, Mr. Macaulay served as Chairman of CHC Group Ltd., Dresser-Rand Group, Inc., Foundation Coal Holdings Inc. and Pride International, and as a director of Dresser, Inc. and National Oilwell Varco.


  • City College of New York, B.B.A.
  • University of Pennsylvania, Wharton School of Business, M.B.A.

Relevant Qualifications and Experience

  • Serves as Chairman, i.e. the lead director, of the Company’s Board
  • Significant investment and financial expertise as chairman of one of the world’s leading energy and natural gas resources private equity firms
  • Chief executive officer experience
  • Extensive knowledge of the oilfield service industry
  • Expansive depth of knowledge of the Company’s business, as a result of his 20-years of experience with the Company and its predecessor

Mark A. McCollum

President and Chief Executive Officer, Weatherford International plc


Mr. McCollum has over 36 years of leadership experience in the energy sector. Prior to joining Weatherford in March 2017 he served as Chief Financial Officer of Halliburton Company, a position he started in 2008 and resumed in July of 2016 following an interim role as Chief Integration Officer during the pendency of Halliburton’s proposed acquisition of Baker Hughes Incorporated.

Prior to joining Halliburton, Mr. McCollum held a number of senior positions at Tenneco, Inc., including Chief Financial Officer, and served as an Audit and Advisory Partner in Arthur Andersen’s Energy Division, where he began his career. He is also a registered CPA in the State of Texas.

Mr. McCollum serves on the Board of Directors for Westlake Chemical Corporation. He is a member of the Board of Regents of Baylor University, and he also serves on the Board of Trustees for Baylor College of Medicine and the Advisory Board of Every Village.


  • Bachelor Degree in Business Administration and Accounting, Baylor University

Relevant Qualifications and Experience

  • Extensive knowledge of and experience in the oilfield service industry
  • Significant leadership experience, with a strong background in accounting and finance
  • Deep understanding of the challenges facing the industry and strong knowledge of customer demands and desires

Mohamed A. Awad

Chairman (Retired), Schlumberger - Middle East and Asia


Mr. Awad is a retired executive who most recently served as Chairman of Schlumberger–Middle East and Asia, a role he held from 2001 to 2012.

Mr. Awad joined Schlumberger in 1981 and, over the next 30 years, held positions of increasing responsibility, both internationally and in the U.S., including in the wireline, well services, drilling and measurement, oilfield services and corporate groups. In addition to his role at Schlumberger, Mr. Awad served as a director on Arabian Drilling Company in Saudi Arabia from 2005 until 2012.


  • University of Tulsa, M.S., Petroleum Engineering
  • Cairo University, B.S., Petroleum Engineering

Relevant Qualifications and Experience

  • Wealth of experience with a career in the oilfield services industry spanning 30+ years
  • Strong technology background which enables him to help guide the Company’s strategic direction
  • Deep appreciation for diversity established through international leadership experience
  • Expertise in Middle East and Asia regions proves beneficial in conducting business in emerging markets

Roxanne J. Decyk

Executive Vice President (Retired), Royal Dutch Shell


Mrs. Decyk is a retired executive who most recently served as Former Executive Vice President of Global Government Relations for Royal Dutch Shell plc. From 2008 until 2009, Ms. Decyk served as Corporate Affairs and Sustainable Development Director of Royal Dutch Shell plc, from 2005 to 2009, she served on the Executive Committee and from 2005 to 2008, she also served as Corporate Affairs Director. Prior thereto, Ms. Decyk was Senior Vice President - Corporate Affairs and Human Resources of Shell Oil Company and Vice President of Corporate Strategy of Shell International Limited. She was previously a Director of Petrofac Limited from 2011 until May 2015, and Snap-on Incorporated from 1993 until June 2014. 


  • University of Illinois at Urbana-Champaign, B.A., English Literature
  • Marquette University Law School, J.D.

Relevant Qualifications and Experience

  • Significant experience in corporate strategy and planning 
  • Experience in various executive leadership positions for international, integrated energy companies
  • Significant experience in human resources and executive compensation
  • Expertise in global government affairs

John D. Gass

Vice President (Retired), Chevron Corporation


Mr. Gass is a retired executive who was formerly a Vice President of Chevron Corporation and President of Chevron Gas and Midstream, a role held from 2003 until 2012.

Mr. Gass joined Chevron in 1974 and his career spanned 38 years during which he held positions of increasing responsibility in engineering, operations and executive management, serving both domestically and various global locations.

Mr. Gass has been a director of Southwestern Energy Company since November 2012. He became a director of Suncor Energy Inc. in February 2014. For the past two years, he served as Chairman of the Board of Visitors for the Vanderbilt School of Engineering and is on the Advisory Board for the Vanderbilt Eye Institute. He is a member of the American Society of Civil Engineers and the Society of Petroleum Engineers.


  • Vanderbilt University, B.E., Civil Engineering
  • Tulane University, M.E., Civil Engineering 

Relevant Qualifications and Experience

  • 38 years of experience in the energy exploration and production industry, providing insight into the needs and priorities of the Company’s customers

  • Executive leadership experience, with a strong emphasis in operational strategy, major project development, and executive management

  • Significant international experience in Europe, Africa and the Asia Pacific region

Francis S. Kalman

EVP and CFO (Retired), McDermott International, Inc.


Mr. Kalman serves as a senior advisor to a private investment subsidiary of Tudor, Pickering, Holt and Co., LLC that specializes in direct investments in upstream, midstream and oilfield service companies.

Mr. Kalman served as Executive Vice President of McDermott International, Inc. from 2002 until his retirement in 2008 and as Chief Financial Officer from 2002 until 2007. From 2000 to 2002, he was Senior Vice President and Chief Financial Officer of Chemical Logistics Corporation; from 1999 to 2000, he was a principal of Pinnacle Equity Partners, LLC; from 1998 to 1999, he was Executive Vice President and Chief Financial Officer of Chemical Logistics Corporation; and from 1996 to 1997, he was Senior Vice President and Chief Financial Officer of Keystone International, Inc.

Mr. Kalman started his career as a Certified Public Accountant with PriceWaterhouse and Co. In addition to the above, he has served in various financial capacities with Atlantic Richfield Company (1975 to 1982), United Gas Pipeline (1982 to 1991) and American Ref-Fuel (1991 to 1996).

In addition to his existing directorships, during the past five years, Mr. Kalman has also served on the board of Pride International, Inc., which merged into Ensco plc, and CHC Group Ltd.


  • Long Island University, B.S., Accounting

Relevant Qualifications and Experience

  • Extensive knowledge in accounting and financial reporting

  • Chief financial officer experience and serving as chairman of the audit committee of other public companies

  • Executive leadership and strategic planning experience in the international energy service industry

  • Experience in multiple components of the energy industry, including internationally

David S. King

Chief Executive Officer (Retired), Archer Company LTD.


Mr. King has more than 35 years’ experience in the international oilfield service industry including serving in executive operational leadership positions at Halliburton Company. He retired from Halliburton in 2010 where he served as the President of the Completions and Production Division, a $7 billion business. In 2013, he came out of retirement when he was recruited to serve as CEO of Archer Company Ltd. In this capacity, Mr. King was instrumental in driving a turnaround, which created strong financial and operational performance over six consecutive quarters and was lead to the successful divestiture of their North American assets in 2015. Mr. King recently retired from Archer.


  • University of Alabama, B.S., Civil Engineering
  • Harvard Business School, Advanced Management Program

Relevant Qualifications and Experience

  • More than 35 years of broad experience in the oilfield service industry
  • Significant Chief Executive Officer and Board experience
  • Extremely driven and results-oriented operational leader
  • Intimate understanding of oilfield services technology


Angela Minas

Chief Financial Officer (former), DCP Midstream Partners


Ms. Minas has more than 30 years of experience in the energy sector. Most recently, she served as the Chief Financial Officer of DCP Midstream Partners LP a role she held from 2008 to 2012, and the Chief Financial Officer of Constellation Energy Partners LLC, a role she held from 2006 to 2008. Prior to her experience in the master limited partnership sector, Ms. Minas served as Senior Vice President, Global Consulting at Science Applications International Corporation and as a partner at Arthur Andersen LLP, leading the firm’s North American oil and gas consulting practice. Ms. Minas also serves as a director of Westlake Chemical Partners LP and the general partner of CNX Midstream Partners LP. She currently serves on the Council of Overseers at Rice University Graduate Business School.


  • Rice University, Jesse H. Jones Graduate Business School, M.B.A., Finance and Accounting
  • Rice University, B.A., Managerial Studies

Relevant qualifications and experience

  • Extensive executive leadership and board experience, including audit committee experience
  • Deep understanding of oil and gas, and broader energy sectors
  • Significant financial and accounting expertise with strong knowledge of the capital markets
  • Proven track record of implementing high-performing corporate growth strategies and business transformation initiatives

Dr. Guillermo Ortiz

Partner and Chairman, BTG Pactual Mexico


Dr. Ortiz is currently a partner and Chairman for BTG Pactual for Latin America, a Latin American investment bank based in Brazil.

He served as the Chairman of Banorte, the third largest bank in Mexico from 2010 until 2014; Governor of the Bank of Mexico from 1998 until 2009; and as Chairman of the Board of the Bank for International Settlements (BIS) in 2009. He previously served as Secretary of Finance and Public Credit in Mexico, from 1994 to 1998.

Dr. Ortiz was also Executive Director at the International Monetary Fund and is a director of several international non-profit organizations. He is currently a member of “The Group of Thirty,” an international body of leading financiers and academics.


  • National Autonomous University of Mexico, B.A., Economics
  • Stanford University, M.Sc. and Ph.D., Economics

Relevant Qualifications and Experience

  • Extensive international finance and banking experience in the public and private sector

  • Expertise regarding global economic matters and multi-national financing, an important element of the Company’s global strategy

  • International perspective, with a focus on Latin America

  • Frequent speaker, author of topical articles, and educator, providing a current perspective on financial matters

Emyr Jones Parry

Chancellor, Aberystwyth University


Sir Emyr has served as the Chancellor of Aberystwyth University, located in Wales, from 2008 to the present and was Chairman of the All Wales Convention, a body established by the Welsh Assembly Government to review Wales’s constitutional arrangements, from 2007 to 2009.

He was Chairman of the Corporate and Social Responsibility External Advisory Group of First Group plc, a transport operator, from 2008 to 2011 and was the Chairman of Redress, a human rights organization from 2008 to 2016. Sir Emyr previously held numerous diplomatic positions, including UK Permanent Representative to the UN from 2003 to 2007 and UK Ambassador to NATO from 2001 to 2003, specializing in European Union affairs including energy policy. He is also the President of the Learned Society of Wales and began his three-year term of office in May of 2014.


  • University of Cardiff, B.Sc., Theoretical Physics
  • University of Cambridge, Ph.D., Polymer Physics

Relevant Qualifications and Experience

  • Wealth of government relations, diplomatic and negotiation experience
  • High level of public and social policy knowledge
  • Important international perspective, with an emphasis on global issues and European markets
  • Years of dedicated focus on social responsibility, sustainability and human rights