Rear Admiral Issah Yakubu was enlisted into the Ghana Navy in October 1987 and was commissioned as an Executive Officer in 1991. He has attended various specialised military and civil courses. Notable among the military courses are the International Midshipmen and International Sub-Lieutenant Courses at the Britannia Royal Naval College, Dartmouth and School of Maritime Operations in Portsmouth, both in the UK.

He attended the Junior and Senior Command Staff Courses at the Nigerian and Ghana Armed Forces Command and Staff Colleges respectively. He is also a two-time graduate of the United States Naval War College, Newport, Rhode Island where he pursued the Naval Staff and Naval Command courses in 2005 and 2015 respectively. He also attended the International Maritime Operations Course at the Coastguard Training Centre, Yorktown, Virginia, USA.

He also has a Bachelor of Science degree in Administration (Human Resource Management) from the University of Ghana (1999 – 2004) and a Post-Graduate Certificate in Public Administration from Ghana Institute of Management and Public Administration (1998).

Rear Admiral Yakubu has held several appointments in the Ghana Armed Forces including the Command of 2 Warships, GNS ANZONE and GNS YAA ASANTEWAA. He was the first Executive Officer of GNS ANZONE and was part of the crew that sailed the Ship from Alaska, USA on its maiden voyage to Ghana. He also sailed GNS YAA ASANTEWAA from Germany to Ghana on its maiden voyage to Ghana. He was a Directing Staff at both the Ghana and Nigerian Armed Forces Command and Staff Colleges and Chief Instructor of the Naval Faculty at the Ghana Armed Forces Command and Staff College. He also served as Director Naval Administration and later Chief Staff Officer at the Naval Headquarters.

He is currently the Chief of Staff at the General Headquarters of the Ghana Armed Forces. He holds a Master of Arts Degree in International Relations from the Salve Regina University, USA and a Post-graduate Diploma in Public Administration from the Ghana Institute of Management and Public Administration.

Rear Admiral Yakubu is an avid researcher and has authored numerous papers on maritime security and strategy. He is Co-Author and Co-Editor of the official history of the Ghana Navy titled “History of the Ghana Navy: A case for a credible Naval Force for National Development”.