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 Group, 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 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 also conducts pre-acquisition anti-corruption due diligence in relation to investments into foreign jurisdictions and advises clients on compliance with trade sanctions and economic embargoes.

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 – and is one of only four lawyers listed as “most highly regarded” – in European investigations by Who’s Who Legal – Future Leaders in 2020 and as a Global Leader noted for his “adept handling of corporate and internal investigations” in 2021. He was listed in GIR 100 2020, Global Investigations Review’s annual guide to the world’s leading cross-border investigations practices and Legal 500 UK in both the 2020 and 2021 guides.

He regularly delivers presentations on bribery, corruption 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