Dr Sebastian Hirsch joined grenke in 2004. After holding senior positions in Controlling at grenke AG and serving on the Board of Directors of grenke Bank AG, Dr Hirsch returned to grenke AG in 2013, initially as General Representative and since 2017 as Board Member for Controlling, M&A, Treasury, Taxes and Investor Relations. On 1 December 2022, as CFO he also took over, initially on an interim basis, as Chief Executive Officer. On 16 February 2023, he was appointed CEO. He is therefore responsible for IT and Digitalisation, Human Resources, ESG, Corporate Communications and Property & Facility Management. In addition, he has been responsible for Administration, Compliance, Corporate Credit, Data Protection and Risk Management on an interim basis since January 2025.
Raised in Alsace, finance, marketing and strategy specialist Gilles Christ has been with grenke since 1998. Since then he has been responsible, among other things, for establishing the company in France and other countries. Since May 2010, Christ has been a member of the Board of Directors, with responsibility for Marketing and Sales as well as Legal. In addition, he has been responsible for Internal Audit on an interim basis since January 2025.
After holding several positions at renowned international consulting firms and the central institution of the cooperative banks, Dr Martin Paal joined grenke AG as Vice President Controlling in June 2022. In March 2023, he was appointed Chief Representative and Senior Vice President and Head of the Finance Division. Effective as of July 1, 2024, he has been appointed to the Board of Directors of grenke AG and appointed Chief Financial Officer. In this role he is responsible for the Accounting & Tax, Controlling and M&A, and Treasury, Investor Relations and Reporting departments.
Isabel Tufet Bayona is a proven expert in compliance, transformation and digitalisation. In her previous position, she served as the Chief Transformation Officer and General Representative on the extended Management Board of Santander Consumer Bank AG. On September 1, 2025, she was appointed to the Board of Directors of grenke AG as Chief Operating Officer (COO). In this role, she oversees the entire back office, including the Credit Centre, internal control functions such as Risk Controlling, Compliance, Anti-money Laundering, Information Security and Data Protection, as well as Human Resources.