1976 University of Sussex, D.Phil. Physics
1976 & 1979 U of Sussex, Research Associate
1977 U of Leeds, Postdoctoral Research Associate
1980 - 85 Cornell University, Senior Research Associate
1986 - 87 General Electric Electronics Laboratory, Senior Research Engineer
1988 - 94 Honeywell Corporation, Senior Principal Research Scientist
1994 - 99 NTNU Trondheim, Professor Fotonik
2000 U of New Mexico & Sandia National Laboratories, Research Professor
2001 - 04 Linkoping University, Professor Electronics Production
2005 - 2010 Sandia National Laboratories, Senior Research Scientist
2010 - 13 U of New Mexico, Research Professor
2014 - Current: Presidency University, Professor Emeritus