' s ▁three ▁ref iner ies ▁running ▁efficiently ▁during ▁his ▁ten ure . ▁He ▁stream ed ▁Fl uid ▁Catal yt ic ▁Cra ck ing ▁Units ▁( F CC ) ▁in ▁K ad una ▁ref in ery , ▁Port ▁Har court ▁F CC ▁was ▁oper ational , ▁while ▁War ri ▁ref in ery ▁was ▁also ▁on ▁stream ▁through ▁the ▁efforts ▁of ▁the ▁in - house ▁exper ts ▁he ▁engaged . ▁ ▁He ▁was ▁eventually ▁rel ieved ▁of ▁his ▁duties ▁by ▁the ▁then ▁Minister ▁of ▁Pet role um ▁Resources , ▁Die z ani ▁Al ison - Mad ue ke . ▁ ▁Con tr ary ▁to ▁report ▁President ▁Good l uck ▁Jonathan ▁did ▁not ▁rel ieve ▁Engine er ▁Andrew ▁Y ak ub u ▁of ▁his ▁appointment ▁as ▁the ▁Group ▁Man aging ▁Director ▁( G MD ) ▁of ▁the ▁Niger ia ▁National ▁Pet role um ▁Corporation ▁( NN PC ) ▁based ▁on ▁cor ruption . ▁Y ak ub u ▁was ▁perce ived ▁to ▁have ▁been ▁removed ▁due ▁to ▁inf ight ing ▁between ▁him ▁and ▁the ▁powerful ▁Minister ▁of ▁Pet role um ▁Resources , ▁Mrs . ▁Die z ani ▁Al ison - Mad ue ke , ▁who ▁was ▁behind ▁his ▁removal . ▁Although ▁the ▁president ▁did ▁not ▁give ▁any ▁reason ▁for ▁his ▁removal , ▁President ▁Jonathan , ▁however , ▁sent ▁a ▁letter ▁to ▁Y ak ub u , ▁thank ing ▁him ▁for ▁his ▁service . ▁▁ ▁Y ak ub u ▁has ▁contributed ▁to ▁various ▁char ity ▁projects ▁in ▁multiple ▁churches ▁and ▁organizations ▁across ▁Niger ia . ▁Over ▁the