▁four - month ▁training ▁st int ▁in ▁various ▁research ▁institutions . ▁Upon ▁returning ▁to ▁Sab ah ▁in ▁ 1 9 8 5 ▁he ▁assist ed ▁Parti ▁B ers atu ▁Sab ah ▁( P BS ) ▁as ▁a ▁back room ▁boy ▁to ▁form ▁the ▁new ▁Sab ah ▁government . ▁He ▁joined ▁the ▁newly ▁set ▁up ▁Institute ▁for ▁Development ▁Studies ▁( ID S ) ▁Sab ah ▁as ▁a ▁research ▁associate , ▁and ▁served ▁for ▁nine ▁years ▁until ▁ 1 9 9 4 . ▁ ▁When ▁B N ▁to pp led ▁P BS ▁in ▁ 1 9 9 4 , ▁Tang au ▁assist ed ▁leaders ▁who ▁left ▁the ▁party ▁to ▁form ▁Parti ▁Dem okrat ik ▁Sab ah ▁( P DS ). ▁For ▁the ▁next ▁five ▁years ▁Tang au ▁served ▁as ▁the ▁Chief ▁Executive ▁Officer ▁at ▁the ▁Institute ▁for ▁Ind igen ous ▁Econom ic ▁Progress ▁( IN DE P ) ▁Sab ah , ▁a ▁think - t ank ▁set ▁established ▁by ▁P DS . ▁The ▁objective ▁of ▁IN DE P ▁was ▁to ▁eng age ▁Pas ok m om og un ▁community ▁groups ▁in ▁Sab ah ▁in ▁polic ym aking ▁and ▁assist ▁UP K O ▁leaders ▁in ▁decision - m ak ings . ▁ ▁Tang au ▁was ▁appointed ▁as ▁Chair man ▁of ▁several ▁federal ▁ag encies ▁and ▁state ▁linked ▁companies ▁such ▁as ▁Sab ah ▁Cultural ▁Board ▁( L K NS , ▁Forest ▁Plant ation ▁Development ▁S dn . ▁B hd ., ▁Malays ian ▁Tim ber ▁Indust rial ▁Board ▁( MT IB ) ▁and ▁Asian ▁Supp ly ▁S dn