Piotr S. Mederski specializes in forest operations, particularly in productivity and costs of cut-to-length technology in thinning operations. Piotr S. Mederski's work focuses on effectiveness of harvester use for broadleaf tree species and the impact of forest operations on the environment, soil, and residual stand. Piotr S. Mederski delivered lectures at European Universities in Florence, Padova, Eberswalde, Viterbo, Jelgava, Saloniki and Reggio di Calabria. Piotr S. Mederski is active in FORMEC conferences, presenting scientific findings in many European countries, Japan, and New Zealand. Piotr S. Mederski is a member of the Committee on Wood Science and Technology of the Polish Academy of Sciences, as well as a European patent coauthor of the following publication: Harvester head for broadleaved tree species, DE102016114579A1 Harvesterkopf für Laubholz.