Karl Hill ya yi murabus a matsayin babban darakta na Martanin Rikicin Najeriya, shirin hadin gwiwa na Cocin Brothers da Ekklesiyar Yan'uwa a Nigeria (EYN, the Church of the Brother in Nigeria). Shi da matarsa, Roxane, sun yi aiki a matsayin daraktoci tun ranar 1 ga Disamba, 2014. Roxane zai ci gaba da tallafa wa Rikicin Najeriya, yana aiki rabin lokaci a matsayin kodineta. Carl ya ƙare wa'adinsa a ranar 31 ga Agusta, don zama fasto na Cocin Potsdam (Ohio) na 'yan'uwa.
Kafin ya fara aiki a matsayin babban darektan shirin mayar da martani kan rikicin Najeriya, Carl na cikin tawagar da ta kai Najeriya a watan Nuwambar 2014, jim kadan bayan da mayakan Boko Haram suka mamaye hedikwatar EYN. A wannan tafiya da kuma duk tsawon wa'adinsa na mataimakin darakta, ya karfafawa al'ummar Najeriya da kuma shugabannin kungiyar EYN a cikin mawuyacin hali.
Tare da Roxane, Carl ya hada kai kuma ya jagoranci tawagogi zuwa Najeriya, ya shirya aika masu aikin sa kai don tallafawa rikicin Najeriya, kuma ya kasance wani muhimmin bangare na sadarwa tsakanin kasashen biyu. Ayyukansa sun haɗa da yin ziyara akai-akai a Najeriya, samar da rahotanni masu gudana na ayyuka, kula da blog, taimakawa da harkokin kudi, da kuma daidaita ayyuka tare da EYN da sauran ƙungiyoyin haɗin gwiwa. A Amurka, ya ji daɗin ziyartar coci-coci kuma yana ƙarfafa su su tallafa wa aikin a Najeriya.
A baya, Hills sun kasance masu aikin sa kai na shirye-shirye da kuma ma'aikatan mishan a Najeriya, suna yin hidima ta Ofishin Jakadancin Duniya da Sabis na darikar. Sun yi koyarwa a kwalejin Bible Kulp ta EYN daga Dec. 2012 zuwa Mayu 2014, har zuwa lokacin da 'yan kungiyar Boko Haram suka sanya yankin rashin tsaro.