Aug 1986 – Jun 1987, Assistant Lecturer of Physics, Norfolk State University, Norfolk, VA.
Aug 1987 – Aug 1994, Assistant Professor of Physics, Norfolk State University, Norfolk, VA.
Aug 1994 – Aug 1997, Associate Professor of Physics, Norfolk State University, Norfolk, VA.
Aug 1997 – Aug 1999, Professor of Physics, Norfolk State University, Norfolk, VA.
Sep 1992 – Jun 1996, Associate Director for Educational Programs, Center for Materials Research, Norfolk State University, Norfolk, VA.
Jul 1996 – Aug 1997, Acting Director, Center for Materials Research, Norfolk State University, Norfolk, VA.
Aug 1997 – Aug 1999, Director, Center for Materials Research, Norfolk State University, Norfolk, VA.
Apr 1998 – Aug 1999, Associate Director representing Norfolk State University, Applied Research Center, Newport News, VA.
Sep 1999 – Jan 2013, Associate Professor of Physics, Graduate School of Engineering and Management, Air Force Institute of Technology (AFIT), Wright-Patterson AFB, OH.
Sep 1999 – Jun 2005, Associate Dean for Research, Graduate School of Engineering and Management, Air Force Institute of Technology (AFIT), Wright-Patterson AFB, OH.
Jan 2013 – Sep 2013, Interim Dean, Graduate School of Engineering and Management, Air Force Institute of Technology (AFIT), Wright-Patterson AFB, OH.
Feb 2013 – Present, Professor of Physics, Graduate School of Engineering and Management, Air Force Institute of Technology (AFIT), Wright-Patterson AFB, OH.
Jun 2005 – Jan 2021, Dean for Research, Graduate School of Engineering and Management, Air Force Institute of Technology (AFIT), Wright-Patterson AFB, OH.
Apr 2019 – Jan 2021, Interim Chief Academic Officer, Air Force Institute of Technology (AFIT), Wright-Patterson AFB, OH.
Jan 2021 – Present, Provost and Chief Academic Officer, Air Force Institute of Technology (AFIT), Wright-Patterson AFB, OH.