Duncan Grieve 

Special Counsel – London
T.+44 (0) 20 7170 8579
100 Bishopsgate
London EC2N 4AG
United Kingdom V-CARD

Duncan Grieve is a special counsel in Cadwalader’s White Collar Defense and Investigations Practice, resident in the London office.

Duncan advises a range of organizations, including multinationals, both on internal corporate investigations and during investigation or prosecution by regulatory bodies including the Serious Fraud Office (SFO), the Financial Conduct Authority (FCA), the Office of Financial Sanctions Implementation (OFSI), the U.S. Department of Justice (DOJ) and the U.S. Securities and Exchange Commission (SEC). He has deep experience in dealing with international investigations involving issues in foreign jurisdictions, including Brazil, Portugal and Lusophone Africa as well as Russia, China, India, Romania, the Czech Republic, Canada and Japan.

Duncan also represents individuals subject to internal, regulatory and criminal investigation. He has acted for clients in relation to Parliamentary Select Committee appearances.

In addition to contentious work, Duncan has extensive experience in anti-corruption compliance in an M&A context. During a secondment to a multinational client, he led the global compliance integration of newly acquired company which was purchased for US$5.1 billion. He conducts pre-acquisition anti-corruption due diligence in relation to investments into foreign jurisdictions and advises clients on compliance with financial sanctions and trade embargoes. Duncan is a member of Cadwalader’s Environmental, Social, and Governance (ESG) taskforce and advises clients on compliance with regulatory obligations and investigations relating to these areas.

Duncan speaks fluent Portuguese and spent two years in Brazil working with a Brazilian law firm where he advised corporate and individual clients in investigations stemming from Lava Jato (Operation Car Wash), including the negotiation of leniency agreements with Brazilian prosecuting authorities and regulatory agencies (MPF, CADE, CGU, TCU).

Duncan was recognized as a rising star - one of four lawyers listed as “most highly regarded” - in European investigations by Who’s Who Legal – Future Leaders in 2020. He was listed as a Global Leader in 2021 and 2022 as ”A great name for Brazil-related investigations" and "…outstanding on criminal defence and investigations matters”. He was listed in GIR 100 2020, a guide to the world’s leading cross-border investigations practices. He is also listed as a “Key Lawyer” in the 2021 and 2022 Legal 500 UK in the areas of Regulatory Investigations and Corporate Crime (Advice to Corporates) and White Collar Crime (Advice to Individuals) “representing individual clients in multijurisdictional investigations, with a particular niche in cases involving Latin American jurisdictions”.

He regularly delivers presentations on bribery, corruption, ESG and effective compliance strategies, and has lectured and published on these topics in the UK and Brazil.

Duncan is admitted to practice in England and Wales.


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Duncan Grieve 


  • England & Wales


  • University of York
  • BPP Law School, Manchester
  • BPP Law School, Manchester