Oleksandr Aleksyeyenko > Marchenko Partners > Kiev, Ukraine > Lawyer Profile

Marchenko Partners

Work Department

Antitrust & Competition


Partner, Head of Antitrust & Competition



Oleksandr Aleksyeyenko is a notable Ukrainian competition law practitioner. Oleksandr has been advising Clients for more than a decade on complex merger clearances and investigations on unfair competition, abuse of dominant position and cartels. He has a strong focus on state aid issues and competition compliance. He also has vast experience of advising Clients on issues related to Intellectual Property and Employment. Previously Oleksandr advised Clients on International Finance transactions.


English, Chinese, Ukranian, Russian


  • American Chamber of Commerce in Ukraine, Competition Committee Co-Chair
  • Public Council with the Antimonopoly Committee of Ukraine
  • International Competition Lawyers Network
  • International Bar Association
  • Ukrainian Bar Association


Master of Laws (Hons) (International Law), Kyiv International University

Lawyer Rankings

Ukraine > Intellectual property

(Leading individuals)

Oleksandr AleksyeyenkoMarchenko Partners

Marchenko Partners has more than a decade of experience advising on trade marks, patents, copyright, regulatory data protection and exclusivity, trade secrets and unfair competition. The client roster includes entities operating in the pharmaceuticals, FMCG, agricultural, retail and financial services sectors. Oleksandr Aleksyeyenko is regarded as one of the market-leading practitioners for both IP and antitrust matters. He recently assisted Next Retail with opposing bad faith registrations of trade marks.

Ukraine > Employment

Marchenko Partners has ‘a highly professional approach, focused on the real needs of the client, and is able to work under pressure of time and circumstances‘. It mainly focuses on internal employment policies and termination strategies, acting predominantly for employers. It also handles contentious matters on behalf of employees. Practice head Oleksandr Aleksyeyenko recently assisted British Airways with the reduction of staff in its local office.

Ukraine > Competition

Marchenko Partners handles high-stakes merger control matters across a broad range of industries, including food and beverage, healthcare and logistics. The firm also excels in assisting clients with state aid complaints and private antitrust litigation, including double damages claims. Oleksandr Aleksyeyenko garners praise from clients, with one noting: ‘every time you communicate with him, you are charged with positive energy and learn new things‘.