Rear Admiral Joy Kobla Amedume yayi aiki a rundunar sojojin ruwan Ghana. Ya yi aiki a matsayin Babban Hafsan Sojojin Ruwa na Gana daga Yuni 1977 zuwa Yuni 1979. An nada shi sau biyu zuwa wannan mukamin da farko daga watan Mayun 1972 zuwa Janairu 1973 sannan daga Yuni 1977 zuwa Yuni 1979. An kama shi a watan Yunin 1979 lokacin da Babban Jami'an Sojojin Gana suka yi juyin mulki a ranar 4 ga Yuni 1979 kuma suka saki Jirgin Lieutenant J J Rawlings wanda aka kama kuma aka gurfanar da shi gaban kuliya don yunkurin juyin mulki a ranar 15 ga Mayu 1979. Daga nan jami'an suka kafa Majalisar Juyin Juya Halin Sojoji (AFRC) kuma suka mai da JJ Rawlings a matsayin jagora. A karkashin rundunar AFRC 8 manyan ofisoshin sojoji da suka hada da tsoffin shugabannin kasashe biyu da Rear Admiral Joy Amedume an gurfanar da su a gaban shari'a kuma an kashe su a ranar 26 ga Yuni 1979. A cikin 2001, an saki gawarwakinsu ga danginsu don sake binne su. Past, CNS. "PAST CHIEF NAVY STAFFS". gafonline.mil.gh. Ghana Armed Forces. Archived from the original on 13 October 2016.