| Period | Institution | Position |
|---|
| 2014 - ON-GOING | THE TECHNICAL UNIVERSITY OF KENYA | DIRECTOR, CENTRE FOR SCIENCE AND TECHNOLOGY STUDIES |
| 2012 - 2014 | THE TECHNICAL UNIVERSITY OF KENYA | FORMER CHAIR, DEPARTMENT OF SCIENCE AND TECHNOLOGY STUDIES |
| 2008 - 2011 | INSTITUTE OF GLOBAL CULTURAL STUDIES, BINGHAMTON UNIVERSITY, STATE UNIVERSITY OF NEW YORK | RESEARCH FELLOW AND ASSOCIATE INSTRUCTOR |
| 2005 - 2011 | AFRICANA STUDIES AND RESEARCH CENTER, CORNELL UNIVERSITY | ASSOCIATE INSTRUCTOR |
| 2005 - 2008 | INSTITUTE OF GLOBAL CULTURAL STUDIES, BINGHAMTON UNIVERSITY, STATE UNIVERSITY OF NEW YORK | POSTDOCTORAL RESEARCH FELLOW AND ASSOCIATE INSTRUCTOR |
| 2002 - 2005 | INSTITUTE OF GLOBAL CULTURAL CENTER, BINGHAMTON UNIVERSITY, STATE UNIVERSITY OF NEW YORK | GRADUATE PROJECT ASSISTANT |
| 1999 - 2001 | BINGHAMTON UNIVERSITY, STATE UNIVERSITY OF NEW YORK | ADJUNCT INSTRUCTOR, DEPARTMENT OF PHILOSOPHY |
| 1997 - 1998 | DEPARTMENT OF PHILOSOPHY, BINGHAMTON UNIVERSITY, STATE UNIVERSITY OF NEW YORK | TEACHING ASSISTANT |
| 1994 - 1996 | DEPARTMENT OF PHILOSOPHY, UNIVERSITY OF NAIROBI | TUTORIAL FELLOW |
| 1992 - 1993 | DEPARTMENT OF PHILOSOPHY, UNIVERSITY OF NAIROBI | GRADUATE ASSISTANT |
| 1991 - 1992 | MINISTRY OF HEALTH, AFYA HOUSE | ADMINISTRATIVE OFFICER |
| 1984 - 1985 | SIXTY FOUR SECONDARY SCHOOL, ELDORET | HIGH SCHOOL TEACHER |
