Dr. Piotr Olejnik is an academic lecturer and researcher specializing in electrochemistry, bioelectrochemistry, conducting polymers, and nanostructured carbon materials. He earned his PhD from the University of Warsaw, supported by prestigious national and EU-funded doctoral fellowships, including the Leading National Research Centre (KNOW) award. His diverse career includes serving as a Principal Scientific Expert at the Central Forensic Laboratory of the Police, where he gained extensive analytical experience in psychoactive substance profiling and electron microscopy imaging of gunshot residues. Currently, he delivers lectures and laboratory courses in Physics, Biophysics, and Biochemistry at the Warsaw University of Life Sciences. Dr. Olejnik’s research focuses on the design, fabrication, and characterization of advanced electrochemical sensors and biosensors utilizing enzymes or aptamers. He also possesses broad expertise in the IR and Raman spectroscopic characterization of biologically significant molecules.