- January 1990 – May 2014: Math 0306, Math 0308, Math 0312, and Math 1314 for about twenty-four years at the Houston Community College
- October 1980 - 1990: Special Services Department University of Houston Downtown
- Fall 1982 - 1995: Upward Bound University of Houston Downtown
- January 1972 - October 1979: Gateway Technical Institute, Racine, Wisconsin, Adult Basic Education (ABE)
- Fall 1978 - Summer 1980: Opportunities Industrialization Center (OIC), Racine, Wisconsin
University of Houston-Downtown, Math Lecturer, MS Department, Fall 1991-present.