Doctor at the Faculty of Civil and Transport Engineering, PUT, since 2011. His main field of interest includes combustion engine emissions, aftertreatment systems, and emission regulation. Dr. Ziółkowski conducts laboratory tests. Most of Dr. Ziółkowski's research focuses on combustion engine operation and on-road emission tests, with a special emphasis on HDVs. Dr. Ziółkowski is a member of the Polish Scientific Society of Combustion Engines.