Urban Systems & Services, Houston, Texas; systems programmer in police message switching, for Houston PD and Dallas County; assembly language on mini-computers; 1970-1972;
SCI, Houston, Texas, data base generator and control sequence compiler for pipeline control system for Shell Oil in Pasadena, Texas; assembly language on mini-computers; 1972-1973;
TRW Systems, near NASA, near Houston, portions of a traffic control system for Baltimore, Maryland; assembly language on mini-computers; 1974;
The Analysts, Houston, Texas, Basic or Fortran on well-logging programs, 1974 ;
Pipeline mapping system in Cobol, Houston, Texas, 1975;
Taught seventh grade math, Port Arthur Independent School District, Port Arthur, Texas, in 1970, several months as a substitute;
Taught as a substitute teacher for shorter assignments, Port Neches-Groves Independent School District, Port Neches, Texas, 1970;
Taught freshman chemistry labs three semesters in college, at Lamar, 1964-1965;
Newspaper proofreader, Beaumont Enterprise, while finishing college, about 1967-1968.
Summer of 1962, or thereabouts, part-time work in a nutrition lab of J. R. Couch, at Texas A&M, as part of a National Science Foundation Summer Program For High Ability Secondary School Students.