He graduated from the Faculty of Law and Administration of the University of Warsaw and completed doctoral studies at the Department of Finance and Financial Law. He also completed academic internships in Amsterdam and Prague.

For many years Jan Szewczak had been a faculty member and a lecturer at the Faculty of Law and Administration of the University of Warsaw and the Vistula University.

He has gained extensive experience in the financial sector. He has sat on the Management Board of PZU Tower, served as Chief Economist of Kasa Krajowa SKOK (credit union), Member of the Sejm (lower chamber of the Polish Parliament) of the 8th term, Chairman of the Standing Subcommittee on Financial Institutions, and Deputy Chairman of the Public Finance Committee and member of the Digitisation Committee of the Sejm.

He is an economic journalist and the author of numerous opinions and expert reports on business processes and ownership transformations.

Its interests include economic history and privatisation processes in Poland and abroad.