Professor of Chemistry and Biochemistry, Department of Natural and Mathematical Sciences, LeMoyne-Owen College, Memphis, USA
? Assistant Professor of Chemistry at Wayne State College, Nebraska, 2001-2005.
? Adjunct Professor of Chemistry in the Chemistry Department of Hendrix College, Conway, Arkansas, 2000?2001.
? Assistant Professor of Chemistry in the Chemistry Department of St. Cloud State University, St. Cloud, Minnesota, 1999-2000.
? Research Associate of Bioinorganic Chemistry in the Chemistry Department of the University of Missouri St. Louis (UMSL), May 1999? Aug. 1999.