text: Sergei Pavlovich Korolev (Russian: Серге́й Па́влович Королёв, IPA: (Audio file "Ru-Sergei Pavlovich Korolev.ogg " not found), also transliterated as Sergey Pavlovich Korolyov, Ukrainian: Сергій Павлович Корольов / Serhiy Pavlovych Korolyov; 12 January 1907 StyleDate 30 December 1906 – 14 January 1966) worked as the lead Soviet rocket engineer and spacecraft designer during the Space Race between the United States and the Soviet Union in the 1950s and 1960s.