| Period | Institution | Position |
|---|
| Feb, 2016 - To Date | Technical University of Kenya | Associate professor and Director of School |
| Feb, 2013 - Jan 2016 | Technical University of Kenya | SENIOR LECTURER and Chair Department of Industrial and Engineering Mathematics |
| March 2012 - Jan 2013 | Technical University of Kenya | SENIOR LECTURER and Chair Department of Statistics and Computational Mathematics Mathematics |
| 2009 - 2012 | CATHOLIC UNIVERSITY OF EASTERN AFRICA | LECTURER |
| 2005 - 2009 | UNIVERSITY OF LEEDS | POST GRADUATE DEMONSTRATOR |
| 2001 - 2005 | CATHOLIC UNIVERSITY OF EASTERN AFRICA | LECTURER |
| 1999 - 2002 | TEACHERS SERVICE COMMISSION OF KENYA | TEACHER |
| 1994 - 1997 | TEACHERS SERVICE COMMISSION OF KENYA | TEACHER |
