Frank specialises in corporate crime and export controls. His experience includes advising on and litigating fraud, corruption and EU sanctions cases. Frank represents both potential suspects and victims. He also has experience conducting internal investigations and advising clients on compliance-related measures. Frank regularly publishes on subjects in his field.

  • Advises Oceanco, universally recognised for designing and constructing bespoke super-yachts, on the intended acquisition of Alewijnse, a highly renowned provider of tailored electrical and automation solutions.
  • Advisering van Freshstream Investments LLP bij het aangaan van een strategisch partnerschap met het toonaangevende Nederlandse sieraden- en lifestylemerk ‘My Jewellery’, samen met CEO en oprichter Sharon Hilgers en CFO/CTO Vilmar Bliekendaal.
  • Advised TBAuctions Netherlands B.V. on its acquisition of Epic Auctions.
  • Law Firm School (cum laude)
  • LL.M. Criminal Law (cum laude) (Universiteit van Amsterdam)
  • LL.M. Commercial Legal Practice (cum laude) (Universiteit van Amsterdam)
  • LL.B. Law (cum laude) (Universiteit van Amsterdam)
  • Admitted to the Bar in the Netherlands in 2010

Expertises

Investigations & Public Enforcement
Cases involving accusations of financial mismanagement, fraud, bribery, money laundering, corruption or violations of international sanctions seriously disrupt a client's operations and damage their reputation.
Corporate Crime
Cases involving accusations of financial mismanagement, fraud, bribery, money laundering, corruption or violations of international sanctions seriously disrupt a client's operations and damage their reputation.
Investigations & Public Enforcement
Cases involving accusations of financial mismanagement, fraud, bribery, money laundering, corruption or violations of international sanctions seriously disrupt a client's operations and damage their reputation.
Corporate Crime
Cases involving accusations of financial mismanagement, fraud, bribery, money laundering, corruption or violations of international sanctions seriously disrupt a client's operations and damage their reputation.

Up and Coming

Chambers Europe

White-Collar Crime & Corporate Investigations (2025 Edition)

"Frank Mattheijer is pleasant to work with and really hands-on."

Chambers Europe

White-Collar Crime & Corporate Investigations (2025 Edition)

"Frank Mattheijer is a very high-performing counsel."

Chambers Europe

White-Collar Crime & Corporate Investigations (2025 Edition)
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Publications

1 July 2025
1 July 2025
Unlawful investigations by private individuals versus the Designation: self-reporting, cooperation, and self-investigation. Note to HR. Tijdschrift voor Bijzonder Strafrecht & Handhaving. (Dutch)
17 December 2024
17 December 2024
Draft bill on international sanctions: towards a future-proof sanctions regime? Tijdschrift voor Sanctierecht & Onderneming. (Dutch)
1 November 2024
1 November 2024
Evaluating the proposed International Sanctions Measures Act: benefits and drawbacks. ZAZA.
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