Science officer Ministry of Animal Health, Enugu, Biafra, 1967-1968. Advisor on nutrition Rehabilitation Commission, Okigwe, Biafra, 1968-1970. Research fellow University Ife, Ile-Ife, Nigeria, 1970.
Executive advisor on nutrition International Union for Child Welfare, Geneva, 1970-1971. Teaching and research assistant Cornell University, Ithaca, New York, 1971-1974, research associate, 1974. Assistant professor Howard University, Washington, 1975.
Associate professor food science & nutrition Alabama Agricultural and Mechanical University, Huntsville, 1975-1982, professor, since 1982, director international programs, since 1979. Special assistant to president Alabama Agricultural and Mechanical University, 1988-1990. Trustee Southeast Consultant for International Development, Washington, since 1980, vice chair board trustees, 1992-1993, chair-elect, 1993-1994, chair, 1995-1996.
Board directors United States Agency for International Development-Peanut-Collaborative Research Support Program, Washington, since 1982, chair-elect, 1994, chair, 1995-1997. Chair Association Directors International Agriculture Progs. 1992-1996; president Aries Enterprises, Inc., Huntsville, since 1983.
Distinguished lecturer Berger Foundation Cornell University, Ithaca, 1993. National program leader, USDA-CSREES, 1997-1998.
Fellow American College Nutrition. Member American Dietetic Association, American College Nutrition, Institute Food Technologists (chair-elect international division, 1991-1992, chair 1992-1993, division committee chair of two committees, 1990-1993, member Institute of Food Technologists awards committee, 1993-1995), Association Nigerians in North Alabama (president 1994-1996), American Association Cereal Chemists, American Chemical Society, Southern Association Agriculture Scientists, Alabama Academy of Sciences, Alabama Council for International Programs (member executive committee), Association International Education Administration, North Alabama International Trade Association, Huntsville Chamber of Commerce (member small business committee 1985-1987), Alpha Zeta, Phi Tau Sigma, Phi Beta Delta.