Jens Köhlhoff,

Tax Advisor, Managing Director
Tel +49 228 28 99 50
Fax +49 228 28 99 510
Konrad-Adenauer-Platz 28
53225 Bonn

Jens Köhlhoff, born in 1973, lives with his wife and two children in Bad Godesberg near Bonn. He originally comes from the Ruhr region and is the Managing Director of GKM GmbH Steuerberatungsgesellschaft in Bonn.

After studying business administration in Gießen, he worked in the "Corporate Tax" section at Arthur Andersen WPG and Ernst & Young WPG in Düsseldorf for several years, as well as Ache & Partner Law Firm in Neukirchen-Vluyn. In 2006, he obtained his Tax Advisor qualifications and initially worked as Tax Manager at BenQ Mobile before joining Mertes & Kollegen Steuerberatungsgesellschaft in 2007, which now operates as GKM GmbH Steuerberatungsgesellschaft, and where he took over as Managing Director in early 2008. For many years now, Jens has been a lecturer at the University of Bonn and the Volkshochschule on tax-related topics with international aspects.

He is an enthusiastic skier and long-distance runner.

Areas of expertise:

  • tax compliance,
  • private client service.



  • Books
  • Author for the “Mandanten-Informationsveranstaltungen” [Client information events] series of the Deubner-Verlag
  • E-Bilanz – die elektronische Steuerbilanz [E-Balance - the electronic tax balance sheet]
  • Ordnungsmäßigkeit der Buchführung [Correctness of bookkeeping]
  • Die Kontrollen der Finanzbehörden [Checks by financial authorities]
  • Die (digitale) Betriebsprüfung [(Digital) tax audits]
Prof Dr Jürgen Mertes, LL.M.
Auditor, Tax Advisor, Managing Director
Prof Dr Carmen Griesel
Lawyer, Tax Advisor, Partner - Managing Director
Vanessa Griesel
Lawyer, Partner
Jonas Neef, LL.M.
Business Lawyer, Tax Advisor, Managing Director
Daniel Born
Tax Specialist, Office Manager, Authorised Signatory
Carina Klaas, Dipl. iur. oec.
Business Lawyer
Christine Steinert
Tax Specialist Assistant, Business Consultancy Project Manager

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