· Research Compter Engineer, NASA Langley Research Center2011–
· Computer Scientist, National Institute of Aerospace2008–2010
· Postdoctoral Associate, National Instiute of Aerospace2007–2008
· Visiting Scholar, UIUC2004–2008
· 2002, Formal Methods, Specification, Refinement, and Verification Summer School2002–2002
· M.S.E., Computer and Information Science., University of Pennsylvania1999–2000
· Ph.D., Computer and Information Science., University of Pennsylvania1999–2008
· Senior Software Engineer, American Compter Technology1996–1999
· Software Engineer, DBA, SA, Research Analysis and Maintenance1993–1996
· Master's degree, Mathematics, George Mason University1989–1995
· masters, Mathematics, George Mason University1989–1995
· M.S., Mathematics, George Mason University1988–1992
· Software Engineer, Unisys1986–1993
· Computer Programmer, Syscon1985–1986
· B.S., Computer Science, Old Dominion University1981–1985