Osyp Andrushkiv was a Ukrainian and Ukrainian American mathematician. He was born on March 21, 1906, in the city of Horodok. He graduated in June 1929 from the Faculty of Mathematics and Natural Sciences of Lviv University. In 1930, he attended the "Higher School of Foreign Trade" in Lviv. In 1932, he passed the teaching exam and gained the right to teach mathematics in gymnasiums. From 1932 until September 1939, he was a teacher at the state women's teachers' gymnasium in the town of Kenty, then held a teaching position at the gymnasium in Kolomyia. On January 1, 1940, he was appointed assistant professor at the Department of Algebra at Lviv State University and simultaneously worked part-time at the Lviv Pedagogical Institute, remaining there until June 1940. From 1942 to 1944, he taught at the Teachers' Seminary in Yavoriv. In 1944, he emigrated to Czechoslovakia and later to Germany. After the war, he privately tutored students in displaced persons (DP) camps in Germany. From 1945 to 1948, he was a teacher at the Ukrainian Gymnasium in Mittenwald. On November 14, 1946, he earned a Ph.D. in mathematics from the Ukrainian Free University in Munich. In 1949, Andrushkiv moved to the United States. Between 1949 and 1976, he taught at Seton Hall University in New Jersey from 1949 to 1976, and was chair of the Mathematics Department from 1962 to 1971. He continued his teaching career from 1977 to 1980 at Saint Elizabeth College in New Jersey. Osyp Andrushkiv's primary scholarly interests included function theory, algebra, and the foundations of logic. Together with his son Roman, V. Vozhakivskyi, A. Sakharov, and others, Andrushkiv successfully advocated at the International Congress in Vancouver (1974) for the Soviet government to release Leonid Plyushch from prison.