Jonathan J. Walsh


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Walsh, Jonathan

Experienced litigator Jonathan Walsh has a broad commercial litigation background with particularly deep experience of professional liability and securities matters in both state and federal courts.

Professional Liability and Securities Litigation

Mr. Walsh has worked on a variety of litigation matters in both state and federal courts, from inception through trial and post-trial appeals. He represents defendants in claims arising from the federal Securities Exchange Act, the Securities Act, the Employment Retirement Income Security Act (ERISA), and state securities laws, as well as in matters related to negligence, fraud, breach of fiduciary duty, breach of contract and other commercial and business torts.

With particular expertise in the professional services sector, Mr. Walsh’s roster of clients include major accounting firms and accountants, law firms, commodities brokers, real estate investment companies, and public and private companies. He was a member of the trial team for a major accounting firm in the WorldCom trial in the Southern District of New York. He currently represents a state sovereign wealth fund in an ongoing securities litigation involving the intersection between U.S. securities laws and sovereign immunity under the Foreign Sovereign Immunities Act (FSIA).

He has represented clients in matters before the Securities and Exchange Commission (SEC), Public Company Accounting Oversight Board (PCAOB), Department of Justice (DOJ) and various state and federal agencies and has conducted internal investigations involving accounting issues, financial reporting and disclosure requirements.

Cybersecurity, Data Privacy and Anti-Corruption Focus

Mr. Walsh frequently advises clients, including sovereign entitities, on complex multijurisdictional cybersecurity issues. He regularly presents Continuing Legal Education (CLE) seminars to other practicing attorneys on developing regulations and guidelines.

He has written extensively on emerging law in the cybersecurity and data privacy fields and on new regulations in the U.S., the E.U. and other foreign jurisdictions on privacy issues.

Mr. Walsh also has significant experience representing companies outside the U.S. on matters related to U.S. sanctions law, including the Foreign Corrupt Practice Act (FCPA). He has also assisted on internal investigations regarding alleged corruption at both public and private companies and provided guidance on instituting compliance programs under U.S. law.

International Arbitration

His disputes experience also includes commercial arbitration work; he has represented clients in proceedings conducted under the auspices of the American Arbitration Association (AAA), International Chamber of Commerce (ICC) and London Court of International Arbitration (LCIA), as well as arbitrations utilizing United Nations Commission on International Trade Law (UNCITRAL) Arbitration Rules. His experience spans a wide range of sectors, including oil and gas, electricity, financial services, and pharmaceuticals.


AV® Preeminent™ Rated by Martindale-Hubbell®