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Vincent Ohannessian focuses on compliance, internal investigations, and criminal business law. He assists clients with implementing compliance programs to meet Sapin 2 Law anticorruption requirements (policies, referential and code of ethics, whistleblowing, LCB-FT [money laundering/terrorist financing procedures], risk mapping, and third-party due diligence procedures). He also assists with inspections held by the French Anti-Corruption Agency.

In addition, Vincent advises companies and their directors on preventing criminal risk by handling risk due diligence on their behalf and by implementing in-house procedures, such as appropriate delegations of authority. He intervenes on complex internal investigations involving fraud, corruption, insider trading, market manipulation offenses, and Office of Foreign Assets Control (OFAC) sanctions violations.

Vincent counsels clients on all stages of criminal proceedings, either as victims or defendants, in France and abroad. He works on the criminal defense of individuals and legal entities such as police custody, preliminary investigations at the Financial Brigade, investigations conducted by judges of the Financial Pole, European arrest warrants, international business criminal law, plea bargainings (CRPC [guilty pleas] and CJIP [judicial interest agreements]), and hearings before criminal courts.

Prior to joining Jones Day, Vincent gained in-depth experience in finance and accounting processes and company and business law, including mergers and acquisitions, restructurings, and legal and tax due diligence. He worked for nine years at a major international audit firm (Big 4), first as a financial auditor for French and foreign multinational companies and then as a tax/legal manager.

Vincent is a former Secrétaire de la Conférence of the moot court competition of the Paris Bar (2004) and a former member of the Paris Bar Council and of the National Bar Council.


  • Swile and Groupe BPCE to combine to create global leader in employee benefitsJones Day is advising Swile, a worktech unicorn, in the acquisition of Bimpli, a subsidiary of Groupe BPCE and leader in employee services and benefits in France.