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Greenberg Traurig, LLPOf Counsel
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Gavin Costelloe

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The Shard, Level 8, 32 London Bridge Street, London 10166, England

White Collar Defense & Investigations, Litigation, Environmental, Social & Governance (ESG) and 4 more

About Gavin Costelloe

Gavin Costelloe is a member of Greenberg Traurig’s White Collar Defense & Investigations Practice in London and represents clients in high-stakes criminal and regulatory matters. Gavin is a former senior prosecutor for the UK’s Serious Fraud Office (SFO) and advises companies and individuals across multiple industries on complex, cross jurisdictional internal, government and regulatory investigations. He advises companies on the UK’s failure to prevent offences relating to bribery and corruption, fraud and tax evasion, as well as compliance with and the risk management of legislation and regulations concerning these offences, money laundering, financial and trade sanctions, and sustainability, human rights and supply chain risk and other matters that fall within the scope of ESG risks.

Gavin handles cases involving domestic and overseas law enforcement including the SFO, the Crown Prosecution Service (CPS), the Office of Financial Sanctions Implementation (OFSI), Companies House (CH), the Competition and Markets Authority (CMA), and he is experienced liaising with overseas law enforcement including the U.S. Department of Justice (DOJ), the Commodity Futures Trading Commission (CFTC) and the Securities & Exchange Commission (SEC). Gavin also provides advice to and defends senior executives and compliance professionals, subject to a range of criminal and regulatory offences and violations.

Recognition & Leadership

Awards & Accolades

•Listed, Best Lawyers in the United Kingdom, 'One to Watch,' Criminal Practice and Litigation, 2025
•Listed, The Legal 500 United Kingdom, 2024-2026
•Regulatory Investigations and Corporate Crime, 2024
•White-Collar Crime, 2024-2026

 

Gavin Costelloe (London, ) View website

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Services

Areas of Law

  • Litigation
  • Other 6
    • White Collar Defense & Investigations
    • Environmental, Social & Governance (ESG)
    • Export Controls & Economic Sanctions
    • Corporate Governance & Compliance
    • Manufacturing & Supply Chain Industry
    • National Security

Practice Details

  • Firm Information
    Position
    Of Counsel
    Firm Name
    Greenberg Traurig, LLP
  • Representative Cases & Transactions
    Cases
    Experience: Representative Matters: Advised individual
    corporate clients on the impact of
    compliance with the UK's financial
    export control sanctions regimes with respect to a range of activities, transactions
    exports,
    drafted voluntary self-reports to the UK's Office of Financial Sanctions Implementation.
    Acted for a number of global corporations, including a number of electronic money institutions
    international construction businesses, in connection with a range of corporate governance, compliance
    other corporate crime risks matters, including bribery & corruption, anti-money laundering
    UK financial
    export control sanctions matters.
    Acted for a former partner of an international law firm prosecuted for offences of fraud
    money laundering in relation to a financial investment scheme involving a 10 million fund. Following submissions at the close of the prosecution case, the judge ruled the case was not safe
    our client was acquitted of all charges.
    Acted for a number of corporations
    individual directors in relation to prosecutions
    threats of prosecution by Companies House in connection with violations of director duties, including the late filing of accounts.
    Acted for a UK based financial services firm in respect of an internal investigation into alleged regulatory breaches.
    Acted for a UK manufacturing company in respect of an internal investigation into alleged breaches of EU
    U.S. financial sanctions.
    Represented a global extractives company in respect of internal
    governmental investigations into alleged bribery
    corruption conducted by the SFO, DOJ, SEC,
    the Australian Securities
    Investments Commission.
    Advised the former CEO of a multi-national company subject to investigation by the SFO, DOJ,
    SEC concerning allegations of bribery
    corruption.
    Represented the former CEO of a company in a HMRC
    CPS prosecution concerning multiple counts of conspiracy to cheat the public revenue
    money laundering.
    Represented one of six defendants on charges of conspiracy to defraud brought by the SFO concerning manipulation of the LIBOR benchmark.
    Advised an individual subject to SFO investigation into multi-jurisdictional bribery
    corruption allegations.
    Represented an individual subject to HMRC prosecution involving multiple counts of cheating the public revenue.
    Represented the former director of a manufacturing company subject to investigation by the CMA for suspected market manipulation
    price fixing allegations.
    The above representations were h
    led by Mr. Costelloe prior to his joining Greenberg Traurig, LLP.
    Government Experience: UK Serious Fraud Office, 2019-2022
    Case Controller
    Principal Investigative Lawyer
    Legal Caseworker, Crown Prosecution Service, 2007-2008
  • Additional Links
    https://www.gtlaw.com/en/professionals/c/costelloe-gavin

Experience

  • Bar Admission & Memberships
    Admissions
    England and Wales
    Memberships

    Professional & Community Involvement

    •Member, The Law Society of England & Wales

  • Education & Certifications
    Other Education
    BPP Law School
    LL.M.

    BPP Law School
    Bar Vocational Course

    BPP Law School
    GDL

    King's College London
    Bachelor’s Degree

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    Greenberg Traurig, LLP has 2750 attorneys at this location.
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    Greenberg Traurig, LLP was established in 1967.

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