Between 1989 and 1990 he served as the last President of Poland in exile. He succeeded Kazimierz Sabbat and resigned his post following Poland's regaining independence from the Soviet sphere of influence and election of Lech Wałęsa as the first democratically-elected president of Poland since World War II. He also passed the presidential insignia to Wałęsa, thus ending the 45-years long episode of the Polish government in exile.

He was listed on the flight manifest[1] of the Tupolev Tu-154 of the 36th Special Aviation Regiment carrying the President of Poland Lech Kaczyński and 95 others, which crashed near Smolensk-North airport near Pechersk near Smolensk, Russia, on 10 April 2010. All aboard, including Kaczorowski, were killed.

(source: Wikipedia)