In 1959, he began his career as a freelance graphic designer and art director. In 1971, he founded the studio “Olaf Leu Design” in Frankfurt am Main, which became known as “Olaf Leu Design und Partner” in 1976. The studio remained in operation until 1991. Since that time, he has devoted himself to design journalism and teaching.
At Olaf Leu’s behest, Adrian Frutiger developed the Linotype Centennial® typeface in 1986.