Wintershall Management. Supervisory Board. Organization.
Wintershall is Germany's largest internationally active crude oil and natural gas producer and subsidary of the chemical group BASF. With about 2,000 colleagues from over 50 nationalities, we are exploring and producing crude oil and natural gas in Europe, North Africa, South America, Russia, and the Middle East. The base for our success: technical know-how, operative excellence and strong partnerships worldwide.
Mario Mehren CEO
Mario Mehren was appointed Chairman of the Board of Executive Directors of Wintershall in June 2015 and has been a member of the Board of Executive Directors since October 2011. In the board the business graduate was responsible for the activities in Exploration & Production in Russia, North Africa & South America.
After completing a course in business administration at Saarland University in Saarbrücken, he began his professional career in 1998 as specialist adviser in BASF's Group Accounting section in the Corporate Finance Department. In 2001, Mehren became Head of Finance and Accounting at BASF Schwarzheide, and in 2003 he moved to BASF in Chile to become Managing Director of Finance and Administration.
The Koblenz-born Mehren joined Wintershall in 2006 as Vice President Finance & Information Management.
Chairman of the Board of Directors of Wintershall
Member of the Board of Executive Directors with responsibility for exploration and production in Russia, North Africa and South America
Member of the Board of Executive Directors with responsibility for the "Russia" Board Department
Head of Finance & Information Management
BASF Chile S.A., Santiago de Chile
Managing Director, Finance and Administration
BASF Schwarzheide GmbH, Schwarzheide
Head of Finance and Accounting
BASF AG, Ludwigshafen
Specialist adviser in the Corporate Finance Department
Saarland University, Saarbrücken
Studies in Business Administration
Ressort 1: CEO
The "CEO" ressort is under the leadership of Mario Mehren as Chairman of the Board of Executive Directors of Wintershall Holding GmbH and is home to the divisions of Human Resources, Communications, Strategic Planning and Portfolio Management, Energy Policy and HSE.
Martin Bachmann Exploration & Production for Europe & Middle East
A trained geophysicist, Martin Bachmann has been a member of Wintershall’s Board of Executive Directors since 2009. He is in charge of Exploration & Production Europe & Middle East.
Having a leading edge in technology is crucial in the oil and gas industry. For Wintershall, investments in innovative know-how are a way of securing the future.Martin Bachmann
Exploration & Production Europe / Middle East
Beside German and English, he also speaks Dutch, French, and Spanish. Born in Switzerland, he studied geophysics at ETH technical university in Zürich. He left the country in 1983 to take up a management position with Shell. Over the next 17 years, his career took him to Spain, Turkey, the Netherlands, and Syria, before he moved to Great Britain to become General Manager of Shell UK Ltd. in 2000.
In 2003, he transferred to The Hague, where he was appointed Vice President Russia, Caspian, and SE Europe. Bachmann joined Wintershall in 2009 as Head of Exploration and Production Europe and Middle East.
Exploration & Production Europe, Middle East
Member of the Board of Executive Directors: Exploration and Development
Shell Energy Europe
Vice President Russia, Caspian & SE Europe
Shell UK Ltd.
General Manager Central North Sea
Syria, Shell Petroleum
Deputy General Manager
Shell EP International Ventures
Head Portfolio Management
Shell International Petroleum
Nederlandse Aardolie Ma. NAM
Area Exploration Manager
Exploration Team Leader
Shell International Petroleum:
Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
Master of Nat. Science, Geophysics)
Military Service with Swiss Airforce
High School Zug, Switzerland
Ressort 2: Exploration & Production Europe / Middle East
The ressort "E&P Europe / Middle East" creates added value through the exploration, development and production of oil and gas in its core and development regions. Its business activities are conducted under global functions (such as Global Development or Global Exploration & New Ventures) and operational units (OPCOs) in the countries.
The OPCOs own the concessions and facilities and operate within their area of responsibility (currently in Germany, Norway, the Netherlands and the Middle East region). The ressort also includes the research division.
Thilo Wieland Exploration & Production in Russia, North Africa & South America
Thilo Wieland, an industrial engineering and business management graduate, has been a member of the Wintershall Board of Executive Directors since December 2015 and is responsible for Exploration & Production in Russia, North Africa & South America.
From August 2017, he supervises issues related to Wintershall’s activities in gas transport projects, including trans-Baltic lines Nord Stream and Nord Stream 2 and their onshore units OPAL and NEL.
After studying industrial engineering at the Technical University of Berlin, he began his career in 1999 at Wintershall Erdgas Handelshaus in Berlin.
Since then he has held various positions within the Wintershall Group, among others as Head of Department Natural Gas Supply West at WINGAS.
Until 2013, he represented Wintershall's shareholder interests in the Nord Stream and South Stream projects before becoming Vice President, Strategy and Portfolio Management, within the Wintershall Group.
As General Manager of Wintershall Libya, Wieland has been responsible for the activities of Germany’s largest internationally active oil and gas producer in the North African country since 2014.
Member of the Board of Executive Directors Exploration & Production in Russia, North Africa and South America
General Manager, Business Unit Libya
Vice President, Strategy & Portfolio Management
Vice President, Senior Project Leader Coordination South Stream/North Stream
Department Head Project Coordination Nord Stream & Special Projects
Department Head Special Projects
Head of Department Natural Gas Supply West
Head of Special Projects
Erdgas Handelshaus Head of Gas Logistics
Erdgas Handelshaus Professional Gas Logistics
Ressort 3: Exploration & Production Russia / North Africa / South America
The Exploration & Production Russia / North Africa / South America ressort under the leadership of Board member Thilo Wieland brings together all Wintershall's activities in Russia, North Africa and South America.
In addition to the existing Wintershall shareholdings – Juzhno Russkoye, Achimgaz and Volgodeminoil – in Russia, other major E&P projects are currently being initiated with Gazprom. Ressort 3 is home to global functions such as Global Facility Engineering and the operating units Argentina and Libya with their concessions and facilities. This Board Department is also responsible for coordinating the Nord Stream projects and the transport companies.
Dr. Ties Tiessen Finances, Sales & Commercial
A lawyer by profession, Dr. Ties Tiessen has been a member of the Board since 2005. He is responsible for Finances, Sales & Commercial. After studying law and political science at Christian Albrechts University in Kiel, from which he graduated with a doctorate, he started his professional career as a lawyer in an international law company in Cologne in 1987. In 1989, he joined BASF’s corporate legal department in Ludwigshafen as a legal adviser.
We have mapped the path to further growth via new projects for example in Norway and Russia. That requires billion-dollar investments but generates a sustainable income.Dr. Ties Tiessen
Finance, Sales & Commercial
After five years, Tiessen was promoted to head of Legal, Tax, Insurance, and Banking at BASF subsidiary Rheinische Olefinwerke GmbH in Wesseling, before transferring to Kassel in 1996 to become head of Legal, Tax, and Insurance at Wintershall.
From 2001 onward, Tiessen worked as General Manager of Wintershall Libya in Tripoli, before being appointed as a member of the Board of Executive Directors of Wintershall in February 2005.
Since 2005 Member of the Board of Executive Directors of Wintershall
Since 09/2014: Finance, Sales and Commercial
2012-2014: Chief Finance Officer
2005-2011: E&P Operations (2008 to 2011 official residence in Moscow)
Wintershall Libya, Tripolis
Director of Legal, Tax and Insurance Affairs
Rheinische Olefinwerke GmbH, Wesseling, Germany (BASF/Shell Joint Venture)
Director of Legal, Tax, Insurance and Banking Department
BASF AG, Ludwigshafen, Germany
Company Attorney, Corporate Legal Department
Attorney at an international solicitor’s office, Cologne, Germany
Doctorate in Law
Second state law exam
Legal Traineeship at Higher Court of Schleswig-Holstein, Germany
First state law exam
Christian Albrecht University, Kiel, Germany
Studies of Law and Political Science
Military service – Reserve Officer
Abitur (General Certificate of Education – A-Level) at Meldorfer Gelehrtenschule
Ressort 4: Finance, Sales & Commercial
The Finance, Sales & Commercial Board Department under the leadership of Dr. Ties Tiessen includes Finance, Information Management, Materials Management, Legal Affairs, Gas Trading (Wintershall's own production), Taxes and Insurance, as well as Sales.
Supervisory Board The Supervisory Board of Wintershall Holding GmbH has nine elected members
Dr. Hans-Ulrich Engel, Chairman
Member of the Board of Executive Directors of BASF SE
Marc Ehrhardt, Deputy Chairman
President Finance Division of BASF SE
Michael Winkler, Deputy Chairman
Trade union secretary
President Procurement of BASF SE
Prof. Dr. Markus Kramer
President Europe, Middle East and Africa of BASF SE
President Petrochemicals of BASF SE
Dr. Klaus Welsch
President Engineering and Maintenance of BASF SE
Works Council President of Wintershall Holding GmbH
Manager in HSE in Barnstorf