Algebra System for analyzing systems of polynomial equations with parameters implemented in Common

2007–2008 Chief Science Officer, QBit, LLC, later Qbit Corp., Gaithersburg, MD. 2005–2006 Senior Research Mathematician, QBit, LLC, Bethesda, MD. 2000–present Professor of Mathematics, University of Arizona, Tucson. 1994–2000 Associate Professor of Mathematics with tenure, University of Arizona, Tucson. 1989–1994 Assistant Professor of Mathematics (tenure-track), University of Arizona, Tucson. 1987–1989 Visiting Member, Institute for Advanced Study, Princeton, New Jersey. 1984–1987 Acting Assistant Professor, University of Washington, Seattle. 1983–1984 Teaching Associate and Visiting Lecturer, University of California, Berkeley. 1983 Teaching Assistant, University of California, Berkeley. 1979–1982 Teaching and Research Assistant, Warsaw University, Poland.