Proffesor, a graduate of the Historical Institute of the University of Warsaw and its research worker in the years 1992-2005. Between 2005-2010 he was a research worker at the German Historical Institute in Warsaw. From 2008 to 2014, he cooperated with the Museum of the History of Polish Jews as a member of the expert group preparing the permanent exhibition. In 2010-2013, the head of the expert group preparing the permanent exhibition at the Museum of Polish History. Since 2011 he has been an associate professor at the University of Warmia and Mazury, and since 2014 he has been working at the Centre for Historical Research of the Polish Academy of Sciences in Berlin: first as a deputy director and from September 2018 as a director.