The EEE External Advisory Council (EAC) provides leadership and advice to EEE. The EAC is composed of sixteen professionals from consulting, industry, government, and academia. In this newsletter, we introduce Stephen A. Leeper and Cherlyn Washington Tribble.

Stephen A. Leeper has spent thirty-five years practicing chemical/biochemical/environmental engineer in process development, manufacturing, and environmental regulation at Evonik Corporation Tippecanoe Laboratories, Eli Lilly & Co, and Idaho National Engineering Laboratory (US Department of Energy facility). Stephen’s responsibilities include reviewing new manufacturing processes to identify environmental issues, potential for value recover, and proper waste disposal/management. Mr. Leeper also uses statistical methods to reduce process variability, and develops processes that include: fermentation for pharmaceutical and enzyme production, fuels and chemicals via bioprocessing, bioremediation technologies, and membrane separations.

Mr. Leeper holds a B. A. in Chemistry from the University of California at San Diego and a M. S. in Chemical Engineering from Purdue University.


Cherlyn Washington Tribble holds a B.S in Engineering, with a concentration in Environmental Engineering, from Purdue University; an MBA from the Lake Forest Graduate School of Management, and an MDiv degree from Garrett-Evangelical Theological Seminary in Evanston, Illinois.  She is currently pursuing the Doctor of Ministry degree at Columbia Theological Seminary in Decatur, Georgia. Mrs. Tribble has also achieved the designation of being a Chartered Industrial Gas Consultant.

Mrs. Tribble has worked in the areas of manufacturing, research and development, consulting, the utilities industry, and the insurance industry in the Northeast, the Midwest and the Southeast.  During her career of almost 35 years, Ms. Tribble has worked at companies such as Cummins Engine Company, Johnson & Johnson, Newark Electronics, and Nicor Gas.  She is currently employed as an environmental consultant at AIG in Atlanta, Georgia.  In addition to working in corporate America over the years, she has also been involved in various civic and community activities.   She has served on the following boards and committees:  Chicago Public Schools Science Fair Judges, Reading is Fundamental in Chicago, Chicagoland Chamber of Commerce Environmental Matters Committee, Secretary of the Chicago Chapter of the American Association of Blacks in Energy, and as 1st Vice Chair of the Midwest Energy Association Environmental Management Committee.  She is currently a member of the Purdue University Environmental and Ecological Engineering Advisory Council; the Board of Georgia Interfaith Power and Light; and the Emory University CREATE Program Local Advisory Council. She is also a member of Zeta Phi Beta Sorority, Inc.