Professor, Dept. of Mathematics
and Statistics, Sam Houston State
University, Huntsville, Texas,
1991 to present.
Associate Professor, Dept.
of Mathematics , University
of Houston, Clear Lake, Texas,
-August 1981 - 1991.
Mathematical Statistician,
NASA/JSC, Houston
1976 - 1981.
Assistant Professor,
Dept. Mathematics and Statistics, Loyola University New Orleans, August 1972
- 1976.