A graduate of the Faculty of Law and Administration of the University of Warsaw, Registered on the list of attorneys-at-law of the Warsaw Bar Association (Okręgowa Izba Radców Prawnych w Warszawie).

From the beginning of his professional career, he has been associated with the capital market. In the years 1994-1999 at the Securities Commission (Komisja Papierów Wartościowych - KPW), initially at the Office of Brokerage Houses and Trust Funds, later as an advisor to the Chair of the Securities Commission (KPW).

During his work at the Securities Commission (KPW), he was also holding the position of the Deputy Chairman of the Examination Committee for Investment Advisors.

Currently at GESSEL, KOZIOROWSKI Kancelaria Radców Prawnych i Adwokatów sp. p., where he created and manages the capital market law department - employed since 1999, partner since 2002.

He was an arbitrator at the Stock Exchange Court at the Warsaw Stock Exchange (Sąd Giełdowy przy Giełdzie Papierów Wartościowych w Warszawie).

Since 2015, he has been a member of the Corporate Governance Committee at the Warsaw Stock Exchange (Komitet Ładu Korporacyjnego przy Giełdzie Papierów Wartościowych w Warszawie), where he was a co-author of the Best Practices of WSE Listed Companies 2016 and of the latest: Best Practices of WSE Listed Companies 2021.

He held the position of the chair and a member of the Supervisory Boards at a number of private and public joint stock companies, for example, IGLOTEX S.A. (the chair of the Supervisory Board), ESALIENS TFI S.A. (the chair of the Supervisory Board), Zakłady Odzieżowe BYTOM S.A., TETA S.A. (the chair of the Supervisory Board), TAURON Polska Energia S.A. (in 2010-2017 and 2021-2024).

An author of numerous publications in the field of the capital market law.

Mr. Leszek Koziorowski meets the criteria of independence from the Issuer and entities significantly related to the Issuer listed in the Act of May 11, 2017 on statutory auditors, audit firms and public supervision, and has no real and significant connections with a shareholder holding at least 5 percent of the total number of votes at the Issuer's general meeting.