Constantin advises and represents companies, executives and board members in all areas of white-collar criminal law, administrative offenses and corporate compliance.

His clients include entities, companies and their managers faced with government investigations or enforcement actions as well as businesses that have suffered damage caused by criminal conduct. He has extensive experience representing clients before prosecutors, regulators and courts.

The prevention of liability risks connected with business decisions in crisis situations is a key aspect of his practice.

He conducts and supports internal investigations and advises on the implementation and improvement of compliance programs.

In addition to investigating and defending cases concerning fraud, breach of fiduciary duty, tax evasion and corruption, in recent years he has been engaged in matters pertaining to product compliance and liability, international financial sanctions (OFAC), money laundering prevention as well as disputes related to management liability in connection with allegations of criminal conduct.


  • Admitted to bar 2013
  • Munich School of Political Science (diploma in political science)
  • Ludwig-Maximilians-University Munich (Dipl.-Jur., Dr. jur.)
  • University of Sydney (LL.M.)
  • International law firm in Berlin und New York 2006-2018

Rankings and Awards

  • Chambers (2024): recommended for white collar crime: corporate advisory ("He is 100% trustworthy, reliable and thoughtful.")
  • Legal500 (2024): "next generation" in white collar crime
  • JUVE (2023/2024): recommended for white collar crime: corporate advice and for compliance investigations ("Rare combination of experienced business lawyer and acknowledged criminal defence lawyer", JUVE 2020/2021)
  • Leaders League (2022): recommended for white collar crime
  • Wirtschaftswoche (2023) top lawyer for compliance
  • JUVE (2018): "40 under 40" corporate lawyers in Germany


  • Lutter, Transformation Act (Umwandlungsgesetz), sections 346-350, 2023
  • beck-online.​GROSSKOMMENTAR, comprehensive commentary on the Act on Limited Liability Companies (GmbHG), sections 82 et seqq. (criminal and administrative offenses), 2023
  • Beck M&A Handbook (Beck’sches M&A-Handbuch), Compliance Due Diligence (together with Vera Jungkind), 2nd edition 2022
  • The injured party’s right to access the files - theory, practice and reform (Akteneinsicht für den Verletzten - Theorie, Praxis und Reform), in: Abraham/Bublitz/Geneuss/Krell/Wegner (eds.), Injured parties in criminal law (Verletzte im Strafrecht), 2020
  • Co-author: Esser/Rübenstahl/Saliger/ Tsambikakis, White Collar Criminal Law including Tax Offences and Procedural Law. A Commentary, 2017 (financial statement fraud and related offences)
  • The rights of aggrieved persons, private persons and other bodies to access or obtain information from the records: sections 406e and 475 of the Code of Criminal Procedure (Akteneinsicht und Auskünfte für den Verletzten, Privatpersonen und sonstige Stellen – §§ 406e and 475 StPO), 2011
  • The Limits of Criminal Law: A Comparative Analysis of Approaches to Legal Theorizing, 2010
  • Symbolic Legislation. An Analysis Taking Criminal Law as an Example (Symbolische Gesetzgebung, Eine Untersuchung am Beispiel Strafrecht), 2006 

Recent Work


  • Industrial company: Investigation and advice regarding allegations of corruption abroad
  • Hengeler Mueller assists Vonovia SE with internal investigation
  • Healthcare company: Global investigations into product compliance
  • GRENKE AG: internal and external investigations in connection with negative statements by a short seller
  • Deutsche Börse AG: internal investigation
  • Medical device company: corporate defence in a proceeding concerning fraud  
  • Technology company: investigations by the U.S. Department of Justice into suspected corruption in several countries
  • Engineering company: investigations into product safety in several countries
  • Bank: corporate defence in a proceeding concerning insider trading