In 2010, he became a special appointee of the Minister of Culture and National Heritage for the establishment of the Center for Polish-Russian Dialogue and Understanding (CPRDiP), responsible for drafting an act of the Parliament and legislation procedures.

Since 2019, Dębski has been serving on the Transatlantic Task Force of the German Marshall Fund and the Bundeskanzler-Helmut-Schmidt-Stiftung (BKHS), co-chaired by Karen Donfried and Wolfgang Ischinger.

[5] Dębski has been the Editor-in-Chief of “Polski Przegląd Dyplomatyczny” [Polish Diplomatic Review] (2007–2010 and 2016–) and the Russian Language Quarterly “Europe” (2001–2010), an author of one of the most acclaimed monographs about the Soviet-German Alliance between 1939 and 1941, with two editions in Poland, and one in Russia (2018).

Zbigniew Brzezinski said that this is: A top-notch reconstruction of a historically complex yet extremely significant phase in the relations between Nazi Germany and Soviet Union.

Former Polish Minister of Foreign Affair Adam Daniel Rotfeld thinks that Dębski's volume is: Ta fascinating story of friendship and competition, hatred and intrigues between Hitler and Stalin - the two leaders and war criminals at the same time, who governed the greatest totalitarian regimes in history.

[...] The author deserves a great recognition for writing a work that, for years to come, will certainly serve as an undisputed source to historians and researchers of the German-Soviet relations in 1939–1941.