About

Osh Wijemanne is an anti-corruption and integrity risk management expert with extensive experience supporting public and private institutions to prevent, detect, and mitigate corruption and fraud. He has advised on integrity and anti-corruption programmes aligned with key international frameworks, including the UN Convention Against Corruption (UNCAC), the OECD Anti-Bribery Convention, and the World Bank Group Integrity Compliance Guidelines, as well as relevant national legal frameworks such as the U.S. Foreign Corrupt Practices Act (FCPA) and the UK Bribery Act.

Osh advises institutions across the full spectrum of their integrity value chain, from integrity risk assessments and programme design to implementation, oversight mechanisms, investigations, and remediation.

Beyond his advisory and operational roles, Osh contributes to policy and regulatory development, advising governments and international organisations on strengthening legal mandates, institutional arrangements, and enforcement mechanisms to combat corruption and enhance governance outcomes.

Osh has held senior leadership roles, including serving as Chief Compliance Officer for a large publicly listed multinational organisation, Senior Legal Counsel at a Tier 1 U.S. Global Systemically Important Financial Institution (G-SIFI), and Head of Anti-Bribery and Anti-Corruption practice at a Big Four professional services firm. In these roles, he advised Global Fortune 500 companies, governments, and multilateral development institutions on strengthening internal controls, oversight, and accountability frameworks.

Osh is admitted as a Solicitor of the Supreme Court of New South Wales (Australia) and is a Member of the International Bar Association’s Anti-Corruption Committee. He is also a Certified Fraud Examiner (CFE) and an ISO 37001 Anti-Bribery Management Systems Lead Implementer. Osh holds a Master of Laws (LL.M.), a Juris Doctor (J.D.), and a B.Sc. in Political Science and International Relations.

Areas of Expertise

Integrity Risk Management Programmes

Risk Assessments & Due Diligence

Anti-Corruption Research & Policy Development

Investigations Into Fraud & Corruption

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