Professor Cieślak has many years of professional experience in the field of criminal law and criminal proceedings.
He represents clients in complicated criminal cases at the stage of preparatory and court proceedings, including before the Supreme Court in cassation proceedings.
After completing his prosecutorial legal training in 1992, Mr Cieslak worked as a prosecutor.
Mr Cieślak combines his profession with scientific work. He is the Head of the Department of Substantive Criminal Law at the Faculty of Law and Administration of the University of Warmia and Mazury in Olsztyn.
Professor Cieslak is also the author of numerous scientific publications on criminal law and criminal proceedings.
As an Of Counsel at RGW, Professor Cieślak supports the team in a number of proceedings in the field of criminal economic and penal fiscal law.