Kazimierz R. Czarnecki was born in 1916 in Poland (at the time under occupation of the Government General of Warsaw and the Military Government of Lublin), to a Polish family.
[1][2] He immigrated to the United States in an unknown year.
[1] He published many papers together with Mary W. Jackson, serving as her long-time mentor.
[3] Czarnecki died on 30 January 2005, in Newport News, Virginia, United States.
[1] In the 2016 film Hidden Figures, the character of Karl Zielinski was a fictionalized version of Czarnecki featured as a wind tunnel expert, who worked together with Mary W.