[4] Ajagu started his career with the Nigerian National Petroleum Corporation (NNPC) where he worked as an administration officer from 1988 to 1989.
He is a member of the Nigerian Economic Summit Group and once served on the board of the Corporate Affairs Commission, Nigeria.
[5][6][7] He was also a member of the Presidential Committee on Job Creation during the former Nigerian President Goodluck Jonathan administration.
[1] He was awarded the Nigeria National Honours of Member of the Order of the Federal Republic in December 2007 by Nigerian President Umaru Musa Yar'Adua.
In 2014, he was awarded the National Productivity and Order of Merit courtesy of the former Nigerian President Goodluck Jonathan.