Oleg Klymchuk

Oleg Klymchuk is a well-rounded intellectual property attorney with a particular focus on IT services outsourcing projects, technology, media and communications (TMC).

Oleg regularly advises on transactions involving brands, technology, data and content, particularly in the context of Ukraine-related cross-border M&A’s, join ventures, financing, licensing and other TMC related commercial and IP agreements.

Oleg routinely advises on IP infringement issues helping clients to cease infringements and manage the risks of potential IP infringement. Oleg’s experience and practice also include enforcement of brands and designs against imitation and unfair exploitation. He has also handled IP licensing contentious matters and open source licensing disputes.

Mr Klymchuk advises Sayenko Kharenko clients on the full range of legal issues related to advertising & marketing, data privacy and related issues. In addition, Oleg has substantial experience in entertainment related matters involving copyright, trademarks and media law.

Prior to joining Sayenko Kharenko in 2014, Oleg worked for one of the leading Ukrainian law firms and in the Kyiv office of an international law firm.

International Trademark Association

The International Association for the Protection of Intellectual Property (AIPPI)

American Chamber of Commerce in Ukraine

European Business Association

Ukrainian Bar Association

LL.M. from Kyiv Intellectual Property Institute of National University “Odesa Academy of Law”

Recognised among the leading lawyers in Intellectual Property by Chambers Europe 2025, IP Satrs 2025, IAM Patent 1000 2025

Named among the notable practitioners in silver league by World Trademark Review 1000, 2026

Recognised among the world’s leading experts by Lexology Index: Data 2025

Recognised among the leading lawyers in Privacy and Data Security by Best Lawyers International 2022

Named among the notable practitioners in Intellectual Property and Informational Technology by Ukrainian Law Firms 2025