Photo of Heiko  Ziehms

Heiko Ziehms

Managing Director


Heiko Ziehms focuses on commercial disputes, including matters related to mergers and acquisitions, joint ventures, infrastructure, and insolvency, as well as transaction advisory services. He is a financial and accounting expert and has been listed in Who’s Who Legal among the most recognised expert witnesses in international arbitration and leading forensic and litigation consultants.

Mr. Ziehms has been appointed as expert in multiple disputes, both commercial and investment arbitrations, and is experienced in giving oral expert testimony. He has worked on matters in ICC, DIS, LCIA, ICSID, and SIAC arbitration forums, ad hoc arbitrations, and the courts. He has worked on some of the most complex corporate disputes in Europe, with values up to several billion euros.

Mr. Ziehms also provides transaction advisory services and advises on completion mechanisms. He has advised on several hundred transactions, including “landmark deals.” He is the author of the book M&A Disputes and Completion Mechanisms (Wolters Kluwer, December 2018) and numerous articles on forensic accounting and damages valuation.

Mr. Ziehms has lived and worked in the United Kingdom, Germany, and the United States. He is a Certified Fraud Examiner and qualified and previously worked as a Certified Public Accountant.


University of California at Berkeley, Haas School of Business
MBA, 1999

Otto-Friedrich Universität Bamberg
Dipl.-Kfm., 1995

Employment History

2011 - 2016

2010 - 2011

2008 - 2010

Senior Manager
2003 - 2007

1999 - 2002



GAR 100 - ranked among the world’s foremost expert witnesses in the tenth edition of Global Arbitration Review’s GAR 100, 2017

Who’s Who Legal, Expert Witness, Arbitration - listed among the leading Expert Witnesses worldwide, 2017

Who's Who Legal, Consulting Expert - Forensics & Litigation Consulting, Accountants, 2016

Who's Who Legal Germany, Expert Witness, Arbitration -  listed as one of the four most highly regarded Expert Witnesses for Arbitration in Who's Who Legal, Germany, 2016

News & Insights

Selected Publications


Professional Affiliations

Institute of Certified Fraud Examiners

Deutsche Institution für Schiedsgerichtsbarkeit