Driving us forward
Our leadership is comprised of dedicated, honest, and inspiring individuals.
Together, they are responsible for leading Weatherford to new heights.
Mr. Mark McCollum is President and Chief Executive Officer for Weatherford International plc.
Prior to joining Weatherford, Mr. McCollum served as executive vice president and chief financial officer for Halliburton. Mr. McCollum also served as senior vice president and chief accounting officer for Halliburton from 2003 to 2007.
Prior to joining Halliburton, Mr. McCollum served in various senior executive positions for Tenneco from 1995 through 2003. Before joining Tenneco, Mr. McCollum spent 14 years with Arthur Andersen LLP and served as an audit and business advisory partner of the firm’s worldwide partnership from 1991 through 1994. He earned a BBA in 1980 from Baylor University.
Mr. McCollum serves on the board of directors for Archrock, Inc. 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.
Christoph Bausch is the Executive Vice President and Chief Financial Officer of Weatherford. He assumed this position in December 2016.
Christoph's previous experience as a public company CFO, his financial expertise, depth of knowledge in the oil and gas industry, as well as leadership capabilities further strengthen Weatherford’s focus on financial discipline, cash flow generation, and improved cost efficiencies.
In May 2016, he joined Weatherford as the Controller-Product Lines. Prior to joining the Company, and since May of 2011, he served as the Executive Vice President and Chief Financial Officer of Archer Limited, an oilfield services company publicly traded in Norway on the Oslo Stock Exchange. Before he joined Archer, Christoph served as a Global Finance Director of Transocean. Prior to that role, he had a 20-year international career with Schlumberger where he held a variety of senior financial positions in the United States, United Arab Emirates, France, Mexico, Venezuela, and Germany across a number of business segments covering operations, engineering, manufacturing, and supply chain.
Early in his career, Christoph worked with a team to program and operate a manufacturing scheduling software. He also led successful contract negotiations of one of the first integrated projects which was a multibillion dollar contract in Venezuela with PDVSA. He managed implementation of several larger ERP systems during his career, purchased and sold many businesses, and led numerous business improvement projects.
Christoph holds an M.B.A. degree ("Diplom Kaufmann") from the University Of Mannheim, Germany. He is fluent in English, German, and Spanish and proficient in French. He and his wife have four children and reside in Geneva, Switzerland.
Karl Blanchard is the Executive Vice President and Chief Operating Officer of Weatherford. He assumed this position in August 2017. In his role at Weatherford, Karl oversees all region and product line operations, QHSSE, sales, engineering, R&D, and supply chain.
Karl brings with him a career of significant achievement and valuable insight gained from more than 35 years in the oil and gas service industry. He served as Chief Operating Officer for Seventy Seven Energy where he was responsible for the drilling, hydraulic fracturing, and rental tool business units, as well as key support functions. As part of Seventy Seven’s leadership team, he successfully transitioned the company into a stand-alone publically traded company, executed cost management initiatives, and implemented a structured process focused on developing in-house leadership talent. These accomplishments resulted in Seventy Seven’s successful merger with Patterson-UTI, creating the second largest land driller and top five pressure pumping company in the United States.
Prior to Seventy Seven Energy, Karl spent more than 30 years at Halliburton throughout which he was responsible for a significant portion of the company’s flagship product service lines, including production enhancement, the number one provider of hydraulic fracturing services globally; cementing, the number one provider of cementing services in the industry; and testing and subsea which was successfully established as a strategic product line within the Halliburton portfolio. He also served as Country Vice President of Halliburton Indonesia.
Karl has a Bachelor of Science degree in engineering from Texas A&M University and is a member of the Society of Petroleum Engineers.
Steven “Steve” Carvalho is the Vice President of Tax. He is responsible for all areas of tax, including global tax planning and compliance.
Steve began his tenure at Weatherford at the beginning of 2013 as the Assistant Vice President of Tax Operations, and was promoted to Vice President of Tax in 2018. During his tenure at Weatherford, he built the Company’s tax operations group from the ground up and led its remediation efforts to address material weakness in tax.
From 2002 to 2012, Steve performed several roles at PricewaterhouseCoopers including Consultant, Manager, and finally, Tax Director. He started his career with Arthur Andersen LLP. While in consulting, Steve served a full spectrum of clients from large multinational corporations to startup technology and life science companies. He has over 20 years’ experience in multinational taxation for large public companies in the areas of tax planning, tax compliance, and tax accounting.
Steve graduated from the University of Rhode Island with a degree in Accounting, and from Suffolk University Law School with a Law degree. He is admitted to the Bar in the Commonwealth of Massachusetts and is a member of the Massachusetts Bar Association.
He is married with three boys. In addition to spending time with his family, Steve enjoys running, hiking and other outdoor activities.
Kyle Chapman is the President for Production and Vice President of QHSSE at Weatherford. Kyle is responsible for driving innovation and addressing customer needs surrounding Weatherford’s Artificial Lift, Drilling Fluids, Pressure Pumping, Production Software and Testing product lines. He is also responsible for driving the culture of health and safety, service quality excellence, enterprise security, and environmental protection in all we do. As a member of the Sustainability Committee, Kyle propels conversations around our safety-enabled technologies, processes, and reduced environmental footprint.
He began his tenure with Weatherford in 1999 as a Design Engineer in the U.S. and then moved to the Latin American region in 2001. Since then, he has held various positions within the company, becoming well versed in our technological offerings and global footprint. He has served as President of Product Line Marketing, and President of the Completion, Production, and Well Construction business units. He has also served as Vice President of the Western Hemisphere, Vice President of Latin America, Country Manager and Central Area Manager for Mexico, Country Manager for Trinidad and Tobago, and Region Business Unit Manager for the main well construction product lines throughout Latin America. He has lived in Brazil, Venezuela, Argentina, Trinidad, and Mexico, and is fluent in Spanish and Portuguese.
In early 2009, Kyle was directly involved in managing the ATG I, II, and IV projects in the Chicontepec field in Mexico, together, the largest integrated project that Weatherford had undertaken globally. The project included the ramp-up of personnel, infrastructure, and day-to-day operations. The project went from zero to 42 drilling rigs operating in a short period of time with associated headcount going from less than 50 people to over 4,000 in the same time period. This is just one of the many accomplishments Kyle has had over his career with Weatherford.
Kyle holds a Bachelor of Science in Mechanical Engineering from Texas Tech University.
In this role, Ellen leads the global human resources function across all geozones and global product lines in addition to all corporate functions. Ellen is a member of the Diverse and Inclusive Committee where she helps ensure a talent management culture that provides our employees with the opportunity to bring their true selves to work.
Ellen joined Weatherford in 2012 and has held various roles in Human Resources, including Vice President of Human Resources for the Western Hemisphere.
Ellen is a business-minded professional with more than 25 years of executive leadership experience. Before Weatherford, Ellen served as the Global Director of Compensation, Benefits, Talent Management and HR Systems at Ascend Performance Materials. She was also the Western Hemisphere Director of Compensation and Benefits at Baker Hughes. She started her career in various consulting roles at AonHewitt and TowersWatson, assisting clients with HR transformations, developing Total Rewards strategies, and implementing state-of-the-art HR technologies and communications solutions.
Ellen holds a Bachelor of Business Administration degree in Management Information Systems from the McCombs School of Business at the University of Texas at Austin. She is married with three teenagers.
Karen David-Green is the Vice President of Investor Relations, Marketing, and Communications for Weatherford.
In this role, she is responsible for leading the Company’s strategic communications, public affairs, and forward-thinking brand. She is also a member of the Disclosure and Sustainability committees, helping ensure consistent messaging in the market place and progressing our sustainability agenda.
Karen joined Weatherford in June 2010 as Vice President of Investor Relations. She then also led Corporate Communications for several years before assuming further responsibility for Marketing. Prior to joining Weatherford, Karen held the role of Vice President of Equity Research covering the U.S. Oil Services and Equipment Industry at Oppenheimer, CLSA, and The Royal Bank of Canada. Karen also held the position of Director of Fixed Income Research at American General Corporation where she was responsible for both the investment grade and high-yield chemical portfolio analysis and allocations. Following her Wall Street career, she served as the head of Global Market Research at Baker Hughes.
Karen is a member of the IPAA/PESA Education Advisory Board supporting student learning in science, mathematics, and emerging technology concepts. She is a member of the Greater Houston Partnership’s Executive Women’s Partnership and the Women’s Energy Network. She is also a former Advisory Board Member of The Women’s Fund.
Karen received her Bachelor of Business Administration from the University of Texas at Austin where she majored in Finance.
Stuart Fraser is the Vice President and Chief Accounting Officer at Weatherford.
In this role, Stuart oversees the accounting and financial reporting functions for the Company and has been responsible for supporting the recent capital market transactions to reduce the debt ratio and streamline the cost structure in one of the most challenging markets in recent history.
Stuart joined Weatherford in 2015 and has served in various senior financial roles including Vice President and Corporate Controller and Vice President of Finance and Purchasing, Sourcing and Logistics. Before his role at Weatherford, he served a 19-year career with Schlumberger Ltd., where he held senior financial positions in global and regional capacities in the US, France, Angola, Malaysia, and Indonesia across a number of business segments covering operations, internal audit, taxation, supply chain, and transformation.
Stuart is a Chartered Accountant and holds a Bachelor of Business degree from the Edith Cowan University in Australia.
Christina M. Ibrahim is the Executive Vice President, General Counsel, and Corporate Secretary at Weatherford.
Christina brings more than 20 years of legal experience in the oilfield services industry, and is responsible for advising the Board, CEO, and other executive management members in the legal affairs of the company such as governance, compliance, litigation, and commercial business, and leads the global legal department. She oversees policy and creates the strategy and structure for the legal department. She has implemented the Weatherford Enterprise Risk Management and is a member of Weatherford’s Sustainability Committee, which drives the sustainability themes and focus areas for the Company each year.
Prior to joining Weatherford, she served as Vice President, Chief Global Commercial Counsel, and Corporate Secretary of Halliburton Company, with additional responsibility for the Supply Chain, M&A, Employment, Securities, and Real Estate practice groups. In her 18 years at Halliburton, she held several leadership positions, including Vice President, General Counsel, and Corporate Secretary for a Halliburton joint venture company. She also served in the practice areas of Governance, Commercial, Regulatory, and Employment law. Prior to joining Halliburton, Christina was a Litigation Attorney with the law firm Wickliff and Hall, P.C.
An active member in the community, Christina is proud supporter of the Texas State Bar, Texas General Counsel Forum, American Bar Association, Association of Corporate Counsel, Women’s Energy Network, and the Society of Corporate Secretaries and Governance Professionals. Christina also serves on several local not-for-profit boards including the Houston Area Women's Center, Prevent Blindness, Texas, and the Association of Women in Energy. Additionally, she serves on the executive leadership team of the Go Red American Heart Association campaign and is a former director of The Rose and the Holocaust Museum Houston.
Christina has received numerous awards recognizing her leadership and achievements including, most recently, the National Diversity Council’s Influential Women Leadership Award. She was selected as a Houston Business Journal’s Women in Energy Leadership honoree, and named a Greater Houston Women’s Chamber of Commerce Breakthrough Woman.
Christina holds a Bachelor of Science in Business Management and Finance from Virginia Tech and a Juris Doctorate degree from Thurgood Marshall School of Law where she graduated magna cum laude.
He is responsible for Weatherford’s Eastern Hemisphere operations and also serves on the Sustainability Committee, helping to provide a diverse perspective of sustainability needs across the organization.
Frederico joined Weatherford in 2010 and has held various positions including Vice President roles for Continental Europe, Europe and Caspian, Sub-Sahara Africa, and Middle East and North Africa.
In his more than 18 years experience in the oil and gas industry, he has worked all over the globe. Prior to joining Weatherford, Frederico spent 12 years working for Schlumberger in various management assignments.
Early in his career with Weatherford, Frederico was responsible for three different regions – Europe, Sub-Sahara Africa (SSA), and the Middle East – where he led substantial enhancements, including several integrated projects in Europe and several high-profile managed pressure drilling projects in offshore Angola. Under his leadership, Weatherford gained positive offshore market share distribution in the West Coast of SSA, won the biggest wireline contract ever executed in Kuwait, and also reduced non-productive time in the complex Saudi Arabia market by 50%.
Frederico graduated with a Mechanical Engineering degree with specializations in Strategic Marketing at Stanford University and an Integrated Reservoir Management degree from the Institute of Petroleum and Imperial College, London.
Lance R. Marklinger is President of Global Sales for Weatherford.
In this position, he oversees Weatherford’s customer engagement culture and seeks opportunities to foster collaboration and integrated solutions that provide enhanced value to operators.
Lance’s career with Weatherford began in 2010 as Region Vice President for Russia. He later became President of Well Construction and Completion and then Eastern Hemisphere President prior to his current role. With more than 30 years of experience in the oil and gas industry, Lance has gained extensive global aptitude through his numerous assignments around the world. Prior to joining Weatherford, he held various leadership positions with Schlumberger in North America and Russia.
A considerable amount of his time in Russia was dedicated to new business start-ups throughout the country and implementing merger and acquisition strategies, These experiences allowed Lance to gain valuable insight into the transactional and cultural nuances that are key to establishing a strong commercial presence within the Russian petroleum sector.
Lance studied Petroleum Technology and holds a degree from Southern Alberta Institute of Technology.
Mark Swift is the President of Weatherford’s Western Hemisphere.
He is responsible for the Western Hemisphere operations and local markets, providing conveyance for Weatherford products and services, forecasting and P&L accountability, local customer intimacy, enterprise compliance, and front-line service quality and safety.
Mark joined Weatherford in April of 2014 as the Region Vice President for Europe and Caspian. In 2015, he became the Vice President for the US. Before joining Weatherford, Mark held various senior level management positions with Halliburton including Global Account Manager for BG and Tullow, Global Operations Manager, as well as Region Manager Eurasia-Pacific for Halliburton Sperry Drilling. He also served as the Area Manager at Halliburton with responsibilities for Continental Europe.
Mark serves on the committee for our Diverse and Inclusive Program, which aims to attract and retain a diverse and balanced workforce, providing employees an environment in which they feel comfortable bringing their true selves to work. He is an active member of the community and resides in Houston, TX with his wife.
Vice President, Chief Commercial Counsel – Europe, Caspian, Russia & Global Litigation
Finance Director, Europe