1966-70 Lecturer, Faculty of Engineering, Alexandria University.
1970-75 Teaching Assistant, University of Manitoba, Winnipeg.
1976-77 Teaching and Research (PDF), University of Regina, Saskatchewan.
1977-79 Visiting Research Fellow, Communications Research Centre, Ottawa.
1979-87 Associate Research Officer, National Research Council of Canada, Ottawa.
1987-present Senior Research Officer, National Research Council of Canada, Ottawa. 
1987-present Associate Professor, E and CE Department, RMC.
1990-present Professor, Electrical and Computer Engineering Department, RMC.
2002-present Canada Research Chair in Electromagnetic Engineering.
2008-present Associate Director, Defence and Security Research Institute.
2009-present Canada Research Chair.
2012-14 Vice Dean, Defence and Security Research.

1991– present Cross Appointment (Professor), Department of Electrical and Computer Engineering, Queen’s University, Kingston
1999– present Cross appointment (Professor), Department of Physics, RMC, Kingston.
1986– present Adjunct Professor, Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg

• Served on several departmental and college committees.
• Developing new laboratory facilities in Microwave Circuits and Communications, Antennas and introducing new CAD techniques in labs.
• Developing new courses and teaching aids, using Antennas, Microwaves and Radar, state-of-the-art computer simulation tools
• Liaison with NRC (National Research Council), CRC (Communication Research Centre), Canadian Space Agency, DRDC (Defence Research Development Canada) and other Institutions and Universities in Canada, U.S. and Europe. Advising industries on Antenna Aspects
• Gave many invited presentations about RMC and research activities in Applied Electromagnetics at other Universities, Research Institutions nationally and internationally and to DND Directorates