Career History
- Regents Professor Emeritus, Department of Biomedical Sciences, Texas A&M University College of Dentistry (2020 to Present)
- Adjunct Professor, Department of Biomedical Sciences, Texas A&M University College of Dentistry (2020 to Present)
- Associate Dean for Research and Graduate Studies, Texas A&M University College of Dentistry (2004-2020)
- Regents Professor,Department of Biomedical Sciences, Texas A&M College of Dentistry (2003-2020)
- Professor, Department of Biomedical Sciences, Texas A&M University College of Dentistry (1985-2002)
- Associate Professor, Department of Physiology, College of Dentistry (1979-1985)
- Associate Professor, Baylor University Graduate School, Dallas (1979-1985)
- Assistant Professor,Department of Physiology, College of Dentistry (1976-1979)
- Assistant Professor,Baylor University Graduate School, Dallas (1976-1979)