Sergii Vasylyshyn is Managing Partner of ADVANQ and an attorney with over 20 years of experience in dispute resolution, competition law, and business defence in complex legal conflicts.

He specialises in competition (antitrust) law, litigation, White-Collar Crime, and business defence in relations with public authorities and regulators.

Sergii advises Ukrainian and international companies on merger control matters, concerted practices, abuse of dominance, state aid, and represents clients in disputes with the Antimonopoly Committee of Ukraine. He is involved in advising on complex transactions and projects requiring regulatory clearance.

Under Sergii’s leadership, the ADVANQ team develops the firm’s competition law, White-Collar Crime, dispute resolution, and defence sector practices. The firm advises Ukrainian and international businesses on projects requiring comprehensive legal support, a strategic approach, and effective engagement with public authorities and regulators.

A dedicated area of his work is advising on projects in the defence industry and public procurement, including matters related to the codification of armaments, performance of state contracts, and regulatory support for enterprises in the security and defence sector.

He has been recognised by leading Ukrainian and international legal rankings, including The Legal 500 and “Client’s Choice. TOP 100 Lawyers of Ukraine”.