Marek Mrówczyński holds a PhD in Law, is a legal counsel, a specialist in financial law, and a graduate of MBA studies.

He began his professional career as a research associate at the University of Silesia. He has extensive, over 20 years of experience in management, both in public companies and private entities. For over 12 years, he managed MASTER – Odpady i Energia sp. z o.o. – a company owned by 9 municipalities in Silesia, including the city of Tychy. Subsequently, from 2014 to 2019, he led Elektrociepłownia Będzin sp. z o.o. From December 2019 to May 2024, he was the President of the Management Board of Instalmedia sp. z o.o.

Additionally, he has held significant positions on supervisory boards. Since 2018, he has been the Chairman of the Supervisory Board of MASTER – Odpady i Energia sp. z o.o. He has also served as an advisor to the Management Board of Veolia Energia Polska S.A., and for many years, he was a Member of the Board of Trustees of the Higher School of Management and Social Sciences in Tychy. He is the Vice President of the Management Board of the Regional Chamber of Industry and Commerce in Tychy, of which Nitroerg has been a member for many years.

In his free time, President Marek Mrówczyński stays active. He participates in marathons and triathlon events. He is also interested in literature, both fiction and professional works in the fields of social sciences and history.

His entire professional career has been linked with NITROERG S.A. (formerly ZTS ERG-BIERUŃ S.A.) Starting from 1985, he was promoted at the Department of Blasting and Explosives from the position of a trainee, specialist and department manager to the plant director and the director of sales and marketing. Since 2011, he has been a Member of the Board of NITROERG S.A. responsible for production, and since 2016 also for the sales division.

He is a graduate of the Silesian University of Technology in Gliwice, the Faculty of Chemistry. He completed post-graduate management studies based on the structure of the MBA programme at the Warsaw School of Economics, and postgraduate studies in the field of opencast mining at the AGH University of Science and Technology in Krakow.

He is a member of the management committee at FEEM (Federation of European Explosives Manufacturers).

A graduate of the Wrocław University of Economics, majoring in Planning and Financing. He also completed postgraduate studies in Corporate Value Management at the Warsaw School of Economics. He has participated in numerous courses and training sessions related to investment advisory, securities trading, financial law, accounting, and taxation.

He began his professional career at Bank Zachodni as an inspector, and later served as Deputy Director of the Brokerage House of Bank Zachodni S.A. From 1997 to 2001, he was the President of the Management Board of Forum – Western Investment Funds Association. For 10 years, he also worked as the Chief Financial Officer at Telefonia Dialog S.A. (a company within the KGHM Group). Since 2012, with a one-year break (2024–2025), he has served as a Member of the Management Board and Chief Financial Officer of NITROERG S.A.