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The GRENKE AG Board of Directors

Most of the leading figures at GRENKE have been with the company for a long time, and this continuity pays off.

Dr. Sebastian Hirsch

CEO and CFO (interim)

Dr. Sebastian Hirsch joined GRENKE in 2004. Having held senior positions in Controlling at GRENKE AG and served as a member of the Board of Directors at GRENKE BANK AG, Dr. Hirsch joined GRENKE AG in 2013, first as a General Manager and since 2017 as a member of the Board of Directors with responsibility for Controlling, M&A, Treasury, Legal, Tax and Investor Relations. On 1 December 2022, he took over the chairmanship of the Board of Directors from Michael Bücker, initially on an interim basis. On 16 February 2023, he was appointed Chief Executive Officer. Dr. Hirsch continues his duties as CFO on an interim basis. 

Gilles Christ

Chief Sales & Marketing Officer

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.

Isabel Rösler

Chief Risk Officer

Since January 1, 2021, Isabel Rösler strengthens the Board of Directors as the Chief Risk Officer (CRO). In this newly created role, she is responsible for key internal control functions such as risk control, compliance, money laundering prevention and data protection. She is also in charge of the Credit Centre and the Administration Department. After graduating with a her degree in Business Administration, Ms Rösler worked in auditing and in the management of Landesbank Baden-Württemberg, and was most recently the Managing Director of SüdLeasing GmbH and SüdFactoring GmbH.

Areas of Responsibility of the Board of Directors Members

Dr. Sebastian Hirsch (CEO and CFO (interim))
Gilles Christ (CSO)
Isabel Rösler (CRO)

Accounting / Taxes

Brand Management





Corporate Communications


Corporate Credit


Data Proctection

Human Resources

Internal Audit

Investor Relations

Risk Management




Portfolio Management

Program „Fast Forward Digital“

Property- & Facility-Management

Treasury / Corporate Finance