Employment

1. Assistant Professor, Department of Mathematics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia (September 1973 to December 1978)
2. Mathematician, Dahlgren U.S. Navy Weapons Research Lab, Summer 1975
3. Visiting Assistant Professor, Department of Mathematics, University of California at San Diego, La Jolla, California (January-June 1978: September 1979-June 1980)
4. Associate Professor, Department of Mathematics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia (September 1978-August 1982)
5. Professor, Department of Mathematics, Virginia Polytechnic Institute and State University (September 1982-present)
6. Visiting Professor, Weizmann Institute of Science, Rehovot, Israel (January-June 1983)
7. Visiting Professor, University of California at San Diego, La Jolla, California (March-June 1987 and 1991)
8. Full Member, Mathematical Sciences Research Institute ``Holomorphic Spaces'' program, Berkeley, California (September-December, 1995)