Marek Wierzbowski is a founding partner of the law firm Prof Marek Wierzbowski & Partners–Advocates and Legal Counselors.

For many years he was a partner of Weil, Gotshal & Manges and subsequently Linklaters, being senior partner of Warsaw offices of these firms. He is mostly known as a capital markets expert, however his expertise in some other areas like M&A, energy law, administrative procedure or international arbitration is also widely recognised.

He is professor ordinarius at Warsaw University School of Law and head of the Department of Administrative Law and Administrative Procedure. He was formerly the Vice-Chancellor of the University of Warsaw, and has taught as a visiting professor at several American schools of law.

As an attorney Professor Wierzbowski has led teams of lawyers acting on a wide range of major transactions including major privatisations and a number of public offerings of securities.

Professor Wierzbowski is a vice-chairman of the Supervisory Board of the Warsaw Stock Exchange (from 2000 to 2004 he was the Chairman of this board), a member of the Public Procurement Board and the President of the Arbitration Court of the Chamber of Brokerage Houses. Previously he was an adviser to the Minister of Privatisation, to the Minister of the Treasury and to the President of the Energy Regulatory Office. He was also a Vice-President of the Arbitration Court of the Polish Chamber of Commerce. He is an author, co-author or co-editor of several handbooks and commentaries widely used in Poland.