According to the profile released by the Army Headquarters, Yerima is a graduate of Political Science from Ahmadu Bello University.
Yerima was Public Relations Officer for the Nigerian Army Officers wives Association, Office of Chief of Army Staff 1994; spokesperson, 81 Division from 1995 to1996 and PRO Nigerian Defence Academy 1996 to 2000.
The new army spokesperson was also Deputy DPR 1 Division Nigerian Army, 2008 as well as Chief of Staff and Coordinator at Directorate of Army Public Relations, 2007 to 2009.
He served as Director of Defence Information between 2009 and 2013; was also Deputy Director, Production at TRADOC from 2013 to 2017 as well as Deputy Director Reserve, Defence Headquarters before his current appointment.
Yarima is member of the Nigerian Institute of Public Relations as well as African Public Relations Association and Fellow of West Africa Society for Administration and Communication.
He was a participant at Senior Strategic Media Operation programme at Reach Cambridge and at Kofi Annan Centre, Ghana.
He also attended Senior Leadership Course at Sheringham United Kingdom and undertook a US-Embassy funded Media tour of Africom in Studgarf Germany.