Uniper SE - Company Profile

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The following section provides information on Uniper SE’s senior management, executives, CEO and key decision makers and their roles in the organization. For more insight into Uniper SE's management and employees, unlock the full data with our company analytics monitoring tool.

Executives

Thomas Blades

Chairman Executive Board Since: 2022 Age: 70

Mr. Thomas Blades has been the Chairman of the company since 2022. Prior to this, he served as Chief Executive Officer at Bilfinger SE, from 2016 to 2021. Previously, he also served as the member of the Board of Management at Linde AG, from 2012 to 2016. Mr. Blade also held the position of Chief Executive Officer at Siemens Energy Oil & Gas Division, overseeing operations from 2009 to 2012. He also served as the President & Chief Executive Officer at Choren Industries from 2004 to 2008. Earlier, Mr. Blades also served as the President and Chief Executive Officer at Spectro from 1998 to 2003. He also served as the Executive Vice President at Halliburton from 1997 to 1998. Bofore this, he also worked as the Chief Operating Officer and Executive Vice President at NUMAR Corp from 1996 to 1997. Mr. Blades also held the position of Vice President and General Manager at Geco Prakla from 1993 to 1996. Mr. Blades also held the position of President at Prakla Seismos AG from 1991 to 1993. He was also the Division Manager of Middle East at Schlumberger from 1989 to 1991. Previoulsy, he was the Human Resource Director Europa at Schlumberger from 1987 to 1989 and District Manager Borneo at Schlumberger from 1986 to 1987. Mr. Blades was also the Marketing Staff Middle East at Schlumberger in 1986 and the District Manager in Teheran from 1984 to 1986. Earlier, he served as a Field Engineer at Schlumberger from 1978 to 1982.

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Michael D. Lewis

Chief Executive Officer; Chief Sustainability Officer; Director - Labour Senior Management Since: 2023 Age: 59

Mr. Michael D. Lewis has been the Chief Executive Officer, Labour Director and Chief Sustainability Officer of the company since June 2023. Prior to this, he served as the Chief Executive Officer at E.ON UK plc from 2017 to 2023. Mr. Lewis also served as the Chief Executive Officer at E.ON Climate & Renewables GmbH from 2015 to 2017. Previously, he also served as the Member of the Board at European Wind Energy Association (EWEA). He also served as the Chief Operating Officer at E.ON Climate & Renewables GmbH from 2007 to 2015. Before this, he also served as the Vice President of Corporate Strategy from 2004 to 2007.

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Christian Barr

Chief Financial Officer Senior Management Since: 2025 Age: 55

Mr. Christian Barr has been the Chief Financial Officer at the company since 2025. Prior to this, he served as the Chief Financial Officer and Director at Lechwerke AG from 2023 to 2025. Previously, he served as the Chief Financial Officer and Director at E.ON UK plc from 2018 to 2023. He also served as the Managing Director and the Chief Financial Officer at E.ON Energie Deutschland GmbH from 2018 to 2023. Mr. Barr served as Division Head (SVP) Controlling at E.ON Deutschland. He served as Division Head (SVP) Controlling and Accounting at E.ON Energie AG from 2008 to 2012. Earlier, he served as Head of Business Development at EW Wesertal, Hameln.

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Holger Kreetz

Chief Operating Officer Senior Management Since: 2023 Age: 56

Mr. Holger Kreetz has been the Chief Operating Officer of the company since March 2023. Prior to this, he served as a Chief Operating Officer of the Asset Management division at Uniper. Mr. Kreetz also served as the Chief Operating Officer of Enerjisa, Country Director of Turkey for E.ON. He served various leadership positions at E.ON, which includes, Chief Operating Officer, Managing director, Vice President, Project Manager and Senior Project Executive.

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Fabienne Twelemann

Chief People and Transformation Officer; Director - Labour Senior Management Since: 2025 Age: 46

Ms. Fabienne Twelemann has been the Chief People and Transformation Officer and Labour Director since 2025. Prior to this, she served as the Executive Vice President HR & Procurator at the company from 2024 to 2025. Previously, she served as Executive Vice President Corporate Communication & Governmental Relations at the company from 2021 to 2024. She also served as the Senior Vice President Decarbonization Projects: Green Customer & Energy Efficiency at the company from 2019 to 2021. She served as Senior Vice President Corporate Messages & Internal Communications at the company from 2017 to 2019. Earlier, she served in various management roles at E.ON SE.

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