She is a legal advisor at the District Chamber of Legal Advisors in Warsaw.
She graduated from law studies at the Faculty of Law and Administration (University of Warsaw) and postgraduate studies in competition law organized by the Institute of Law of the Polish Academy of Sciences.

For the past 10 years, she has been dealing with variety of issues in the field of competition and consumer law, also supporting the work of lawyers specializing in the regulatory area. She advises on the day-to-day operations of clients including those in the food, pharmaceutical and telecommunications sectors. She has also conducted numerous merger control proceedings for entrepreneurs in various industries.

Antonina participates in antitrust and regulatory proceedings before the Court of Competition and Consumer Protection, the Court of Appeals and the Supreme Court. She was also involved in antitrust proceedings before the European Commission, which, following a challenge to a decision finding an infringement, had its finale before the European Court of Justice.

She has worked in an international law firm in Warsaw and London, as an in-house or seconded lawyer to support the in-house legal department, as well as at a renowned transactional law firm, taking part in projects in various industries in the field of Polish and European competition law.