2000- Professor Department of Computer and Mathematical Sciences,
University of Houston-Downtown
1992-2000 Associate Professor Department of Computer and Mathematical Sciences,
University of Houston-Downtown
1986-1992 Assistant Professor Department of Computer and Mathematical Sciences,
University of Houston-Downtown
1981-1986 Graduate Teaching Associate Department of Applied Mathematical Sciences,
The University of Texas at Arlington, Arlington, Texas
1979-1981 Teaching Assistant Department of Mathematics,
Lamar University, Beaumont, Texas

 
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