Following the death of Władysław Stasiak, the chief of the Chancellery of the President of the Republic of Poland, Komorowski appointed Jacek Michałowski to succeed him on an acting basis. A high number of vacancies following the Smolensk crash necessitated numerous other appointments. On 12 April, he appointed retired General Stanisław Koziej head of the National Security Bureau in place of the late Aleksander Szczygło.
