Joseph Leo Doob was an American mathematician, specializing in analysis and probability theory. Joseph L. Doob was born in Cincinnati Ohio, February 27, 1910. He received the degrees: AB in 1930, AM in 1931, and PhD in 1932 from Harvard University. Doob is a member of the National Academy of Sciences and Foreign Associate of the Academy of Sciences, France. He was President of the Institute of Mathematical Statistics in 1950 and of the American Mathematical Society in 1963 and 1964. He received the National Medal of Science in 1979. In 1984 Doob was awarded the Career Prize by the American Mathematical Society for "his fundamental work in establishing probability as a branch of mathematics and for his continuing profound influence on its development." He died on June 7, 2004, Urbana, Illinois, United States.