| Professional Employment |
| Permanent Positions |
| 1986-present | Professor | University of South Carolina,
Columbia, SC |
| 1991-1994 | Department Chair | University of South Carolina,
Columbia, SC |
| 1979-86 | Associate Professor | University of South Carolina,
Columbia, SC |
| 1975-79 | Assistant Professor | University of South Carolina,
Columbia, SC |
| Visiting Positions |
1995-96 | Visiting Professor | University of Hawaii,
Honolulu, HI
|
| 1994 (Summer) | Visiting Researcher | LaTrobe University,
Bundoora, Australia |
| 1985 (Fall) | Visiting Professor | University of Colorado,
Boulder, CO |
| 1982-83 | Visiting Fulbright Professor | University of The
Philippines |
| 1982 (Spring) | Visiting Associate Professor | University of
Hawaii, Honolulu,HI |
| 1979 (Fall) | Visiting Associate Professor | University of
California, La Jolla,CA |
| 1975 (Summer) | Visiting Research Mathematician | Technische
Hochschule, Darmstadt, Germany |
| Postdoctoral Positions |
| 1973-75 | J. W. Young Research Instructor | Dartmouth College,
Hanover, NH |
| 1973 (Summer) | Visiting Assistant Researcher | University of
California, Berkeley, CA |
| 1972-73 | NRC Postdoctorate Fellow | University of
Manitoba, Winnipeg, Canada |
| Service on Professional Panels |
| 2010 | East Carolina University: External Review of the
Mathematics Department (Committee Chair) |
| 2004 | Southern Association of Colleges and Schools:
Accreditation Review Panel |
| (Auburn University) |
| 2003 | Southern Association of Colleges and Schools:
Accreditation Review Panel |
| (Mississippi State University) |
| 1995-97 | Council for International Exchange of Scholars:
Discipline Advisory Committee in Mathematics |
| (Part of the selection process for Fulbright awards) |
| 1995 | Southern Association of Colleges and Schools:
Accreditation Review Panel |
| (University of Central Florida) |
| 1993 | Southern Association of Colleges and Schools:
Accreditation Review Panel |
| (Texas A& M University) |
| 1988 | National Research Council: NSF Graduate Fellowship Selection
Panel (Computer Science) |
| Conference Organization |
| Order, Algebra, and Logic,
| May 2007, Nashville, Tennessee
|
| American Mathematical Society Regional Meeting,
| October 2004, Nashville, Tennessee
|
| Algebras, Lattices, Varieties
| August 2004, Boulder, Colorado
|
| Association for Symbolic Logic
| July 2004, Torino, Italy
|
| Modern Algebra and Its Applications
| May 2002, Nashville, Tennessee
|
| American Mathematical Society Regional Meeting,
| March 2001, Columbia, South Carolina
|
| Universal Algebra and Lattice Theory | July 1996, Szeged,
Hungary |
| Modern Algebra and Its Applications | May 1996, Nashville,
Tennessee |
| Lattices, Ordered Sets, and Algebra | August 1993, Szeged,
Hungary |
| Universal Algebra and Category Theory | July 1993, MSRI, Berkeley,
California |
| The Alan Day Conference | August 1992, Hamilton, Ontario,
Canada |
| The Jónsson Symposium (Chair) | July 1990, Laugarvatn,
Iceland |
| The Fifth Southeastern Logic Symposium | March 1989, Charlotte,
North Carolina |
| International Symposium on General Algebra | July 1988,
Karlovy Vary, Czechoslovakia |
| The Fourth Southeastern Logic Symposium (Chair) | March 1988,
Columbia, South Carolina |
| Conference on Algebras, Lattices, and Logic (Chair) | July 1987,
Asilomar, California |
| The Fine Structure Symposium (Co-Chair) | June 1986, Berkeley,
California |
| Conference on Universal Algebra and Lattice Theory | January 1982,
Puebla, Mexico |
| Day Meeting on Algebra and Logic (Chair) | December 1979, San Diego,
California |