He graduated from the AGH University of Science and Technology in Kraków, where he obtained a master's degree in engineering majoring in metal drawing at the Metallurgical Department in 1983. From 1983 to 1984, he was employed at the Jaworzno Power Plant Complex. In February 1985, he took a job at KWK Zofiówka in Jastrzębie in the CHP Plant Division. After the establishment of Jastrzębska Spółka Węglowa S.A. and the spin-off of Spółka Energetyczna Jastrzębie S.A., he continued to work in its structures until 2016. During the period of his professional work in the structures of Jastrzębska Spółka Węglowa S.A. and Spółka Energetyczna Jastrzębie S.A., Mr. Marek Szczęch served, among others, as Director for Investments and Overhauls, Deputy Director for Financial Matters, Director of the Asset Management Office and Director of the "Moszczenica" CHP Plant. Mr. Marek Szczęch has served as a member of the Supervisory Board of Waryński Trade sp. z o.o. since 2024, while since 2016 he has been a private entrepreneur, co-owner of SMART IDEA sp. z o.o.
According to the declaration submitted, the JSW S.A. Supervisory Board member does not meet the independence criteria set out in Rule 2.3 of the "Code of Best Practice for WSE Listed Companies 2021".