| 1/17 – current | Professor and Palmer Chair | Department of Electrical and Computer Engineering, Iowa State University Ames, IA, USA |
| 8/13 – 12/16 | Professor and Chair | Department of Electrical and Computer Engineering, Illinois Institute of Technology, Chicago, IL, USA |
| 2/10- current | President and CTO | Video Analytica, Inc., Woodridge, IL, USA (www.videoanalytica.com) |
| 8/14 – | Adjunct Professor | Department of Electrical and Computer Engineering, Department of Computer Science, University of Illinois, Chicago, IL, USA. |
| 8/12 – 5/14 | Professor | Department of Electrical and Computer Engineering, University of Illinois, Chicago, IL, USA (on leave of absence: 8/13 – 8/14) |
| 8/12 – | Adjunct Professor | Department of Computer Science, University of Illinois, Chicago, IL, USA. |
| 6/12 – 8/13 | Director Graduate Studies | Department of Electrical and Computer Engineering, University of Illinois, Chicago, IL, USA. |
| 8/09 – | Adjunct Professor |
Department of Electrical and Computer Engineering (100%), Department of Computer Science (0%), Department of Health Information Sciences (0%), University of Illinois, Chicago, IL, USA. |
| 5/05 – 8/12 | Professor | Department of Computer Science (50%), Department of Electrical and Computer Engineering (50%), University of Illinois, Chicago, IL, USA. |
| 5/05 – 7/09 | Professor | Department of Computer Science (50%), Department of Electrical and Computer Engineering (50%), University of Illinois, Chicago, IL, USA. |
| 9/00 – 4/05 | Associate Professor | Department of Computer Science (50%) and Department of Electrical and Computer Engineering (50%), University of Illinois, Chicago, IL, USA. |
| 6/00 – 9/01 | Associate Professor | Department of Electrical and Computer Engineering (also joint appointment with the Department of Computer and Information Science), University of Delaware, Newark, DE, USA. |
| 6/95 – 6/00 | Assistant Professor | Department of Electrical and Computer Engineering (also joint appointment with the Department of Computer and Information Science), University of Delaware, Newark, DE, USA. |
| 6/93 – 5/95 | Visiting Assistant Professor | School of Electrical and Computer Engineering (50%) and Department of Computer Sciences (50%), Purdue University, West Lafayette, IN, USA. |
| 8/89 – 5/93 | Research Assistant | Dept. of Electrical Engineering, University of Southern California, Los Angeles, CA, USA. |
| 1/91-5/93 | Teaching Assistant | Dept. of Electrical Engineering, University of Southern California, Los Angeles, CA, USA. |
| 6/90-5/93 | Unix Consultant | University Computing Services, University of Southern California, Los Angeles, CA, USA. |
| 1/85-8/86 | Industrial Experience | National Engineering Services of Pakistan (Ltd.), Lahore, Pakistan. |