Leon Joel Osterweil is an American computer scientist noted for his research on software engineering.
He then joined the Department of Computer Science at the University of Colorado Boulder as an assistant professor in 1971.
In 1988, he became a professor at the University of California at Irvine and he was department chair from 1989 to 1992.
In 1993, he became a professor of Computer Science at the University of Massachusetts Amherst.
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