Born in Kyzyl-Orda, Kazakhstan, Kreytor (nee Smurzhinska) lost her father as a child, and moved to Tashkent, Uzbekistan, with her mother. There, she studied at the Department of Civil Engineering of Central Asian Industrial Institute, from which she graduated in 1948. She met her husband, a Ukrainian Vasyl Kreytor, during an internship at a theater construction site in Tashkent: Kreytor was a deputy director of the internment camp for German and Japanese prisoners of war, whose labor was used at the construction. After the birth of their first son the family moved to her husband’s native Kirovohrad (today Kropyvnytskyi). 

In 1949, Kreytor was appointed chief architect of a workshop at the Kirovohrad Research Institute Oblproekt (“Regional Project”). Between 1962 and 1968, she was the city’s chief architect. In 1968–1982, she was the chief architect of the Kirovohrad branch of the Ukrkolhospproekt institute. In 1978-87, Kreytor was the chairwoman of the National Union of Architects of Ukraine, and since 1987 – Executive Secretary of the Kirovohrad Regional Organization. In the 2000s, she was the chief architect of the construction company “Kirovohradbudinvest”. She was awarded the title Distinguished Architect of Ukraine in 2003–the first Kirovohrad architect to be awarded this honor.