1931
Born to Arthur Max and Marcella E. (Smith) Leissa in Wilmington, DE.
1954
Works as an engineer for Sperry Gyroscope Co. in Great Neck, NY until 1955.
1956
Is an instructor of engineering mechanics at Ohio State University until 1958.
1958
Earns a Doctor of Philosophy from Ohio State University.
1964
Teaches as a professor of engineering mechanics at Ohio State University until 1999.
1971
Performs in 13 Columbus Symphony Orchestra Operas through 1979.
1972
Is a visiting professor at the Federal Institute of Technology in Zürich, Switzerland.
1974
Marries Trudi E. Achenbach on April 11.
1977
Receives a Recognition Plaque from the Institute de Mecanica Aplicada in Argentina.
1978
Serves as the leader of the Ohio State University Mount McKinley Expedition.
1985
Is a visiting professor at the Air Force Academy in Colorado Springs, CO.
1987
Becomes president of the American Academy of Mechanics.
1993
Receives the Centennial Certificate from the American Society of Engineering Education.
1993
Becomes editor-in-chief of Applied Mechanics Review, serving for 14 years.
1994
Is a member of the editorial board of the Journal of Vibration and Control.
1997
Founds and is general chairman of the International Symposium on Vibrations on Continuing Systems.
1999
Teaches as a professor of mechanical engineering at Ohio State University until 2001.
2000
Is a member of the editorial board of the International Journal of Structural Stability and Dynamics.
2001
Is named professor emeritus by Ohio State University.
2021
Maintains membership with the American Society of Engineering Education, Colorado Mountain Club and American Alpine Club.