At the OSW since 2015, first in the Security and Defence in Northern Europe Project, then in the Regional Security Programme. In 2022-2024 Piotr worked in the bureau of the Swiss Federal Office for Customs and Border Security at the Embassy of Switzerland in Warsaw (with accreditation for Poland, the Czech Republic, Slovakia and Frontex). He has expertise in NATO’s defence and deterrence, security and defence policy of the main NATO member states and security in the Nordic-Baltic region.