Signature Litigation LLP

White collar crime and investigations

Duncan is a Partner at Signature Litigation with deep experience in leading cross-border investigations involving issues in foreign jurisdictions, acting for corporates, boards and individual clients, and has advised on many of the major multinational investigations of the last 15 years.

He has market-leading experience in conducting investigations involving Brazil, Portugal and Lusophone Africa and has also handled major matters involving Russia, China, India, South Africa, Ecuador, Kazakhstan, Saudi Arabia, Germany, Greece, Romania, the Czech Republic, Canada and Japan.

A fluent Portuguese speaker, Duncan spent two years in Brazil advising clients in investigations stemming from Lava Jato (Operation Car Wash), including the negotiation of novel leniency agreements with Brazilian prosecuting authorities and regulatory agencies.

Duncan represents individuals subject to internal, regulatory and criminal investigation. He advises on all sensitivities and risks arising from such matters including legal, reputational and privacy issues and is attuned to the need to maintain relationships with government and regulatory authorities.

Duncan also advises on financial sanctions and trade embargoes. He provides counsel to clients on the application of UK sanctions across a range of sectors and assists clients to comply with reporting obligations to the UK authorities, as well as handling investigations into potential sanctions breaches.

He provides expert support to General Counsel, Chief Compliance Officers and boards in relation to broader compliance issues. He leads major integrity initiatives, for example, conducting a global compliance integration for a multinational manufacturing conglomerate following a $5.1 billion acquisition. He regularly handles pre-acquisition anti-corruption due diligence in relation to investments into foreign jurisdictions.

Signature Litigation, Partner, 2025.

Cadwalader Wickersham & Taft - Associate, 2020 - 2021; Special Counsel, 2022 - 2023; Partner, 2024 – 2025.

Aroeira Salles Advogados - International Counsel, 2018 – 2020.

Morrison & Foerster – Trainee Solicitor, 2009 – 2011; Associate, 2011 – 2017.

English and Portuguese