Professor, born 1937; B.S. University of Chicago (1958); M.S. University of Chicago (1959); Ph.D. Catholic University of America (1964); Physical Chemist, National Bureau of Standards (1961-64); Research Associate (1964-65), Assistant Director (1965-68), Theoretical Chemistry Institute, University of Wisconsin-Madison; Lecturer, Department of Chemistry, University of Wisconsin-Madison (1966-68); Research Staff (1968-75), Technical Planning Staff (1975-76), Manager (1976-78) IBM Corporation; Director, National Resource for Computation in Chemistry (1978-81); Associate Director, Lawrence Berkeley National Laboratory (1978-81); Senior Fellow for Science and Engineering and Assistant to the Director for Human Resource Development, NSF (1995-96); U.S. National Committee IUPAC (1976-79); Chemistry Advisory Panel, NSF (1981-83); Advanced Scientific Computing Advisory Panel, NSF (1985-87). Faculty Senior Scientist, Chemical Sciences Division, Lawrence Berkeley National Laboratory (1981-), Department of Energy Advanced Scientific Computing Advisory Committee (2000-2004); Committee on the National Medal of Science (2000-2002); International Academy of Quantum Molecular Science (2006); Gordon Research Conferences, Council (1997-2000), Site and Selection Committee (2000-2006), Board of Trustees (2006-); University of California, Berkeley Chancellor's Award for Advancing Institutional Excellence (2006); Symposium in Honor of William A. Lester, Jr. on his 70th Birthday, University of California, Berkeley (2007); William A. Lester, Jr. Festschrift in Journal of Physical Chemistry, Volume 112 Number 10 (2008).