Aug. 1, 2010 - Sept. 1, 2011
Portfolio Manager - Office of Education at NASA HQ
Dec. 1, 2009 - Dec. 1, 2010
Propulsion Acaademy Coordinator at NASA Marshall Space Flight Center
Aug. 1, 2005 - Aug. 1, 2007
NASA Administrator's Fellow / Visiting Professor at NASA Marshall Space Flight Center / Fisk University
Aug. 1, 1999 - June 1, 2014
Propulsion Chemist & Materials Scientist at NASA Marshall Space Flight Center
Aug. 1, 1993 - Aug. 1, 1999
Associate Professor at Austin Peay State University