| Lecturer | : | Dept. of Computer Science | June 1982 - July 1987 |
| and Engineering, IIT, | |||
| Madras, India 600 036 | |||
| Asst. Prof. | : | -DO- | July 1987 - Jan. 1991 |
| Asso. Prof. | : | -DO- | Jan. 1991 - May 1995 |
| Professor | : | -DO- | May 1995 - Present |
| H.O.D. | : | -DO- | Oct. 1998 - Aug. 2001 |
| Visiting Professor | : | Information Communication | Jan. 2003 - Jan. 2004 |
| University, Korea |