8 0 , ▁she ▁moved ▁to ▁the ▁Pacific ▁Gas ▁and ▁Electric ▁Company , ▁initially ▁working ▁in ▁utility ▁rate ▁setting ▁and ▁other ▁regul atory ▁matters . ▁She ▁became ▁P G & E ' s ▁Vice ▁President ▁of ▁Str ateg ic ▁Pl anning ▁in ▁ 1 9 8 7 . ▁The ▁next ▁year , ▁she ▁participated ▁in ▁the ▁process ▁that ▁led ▁to ▁the ▁creation ▁of ▁California ' s ▁reg ulations ▁designed ▁to ▁promote ▁energy ▁efficiency . ▁She ▁led ▁P G & E ▁into ▁energy ▁rest ruct uring . ▁ ▁Pf ann enst iel ▁left ▁P G & E ▁in ▁ 2 0 0 0 , ▁becoming ▁an ▁energy ▁consult ant , ▁providing ▁advice ▁to ▁companies ▁working ▁in ▁the ▁field ▁of ▁wind ▁power ▁and ▁to ▁local ▁housing ▁authorities ▁about ▁energy ▁use . ▁ ▁On ▁April ▁ 2 0 , ▁ 2 0 0 4 , ▁Governor ▁of ▁California ▁Arnold ▁Schwar zen eg ger ▁appointed ▁Pf ann enst iel ▁to ▁a ▁four - year ▁term ▁as ▁a ▁member ▁of ▁the ▁California ▁Energy ▁Commission , ▁a ▁board ▁with ▁responsibility ▁for ▁power ▁plant ▁lic ens ing , ▁building ▁and ▁app liance ▁efficiency ▁standards , ▁and ▁energy ▁policy ▁development . ▁She ▁became ▁Chair ▁of ▁the ▁Commission ▁in ▁June ▁ 2 0 0 6 . ▁Her ▁term ▁on ▁the ▁Commission ▁exp ired ▁in ▁January ▁ 2 0 0 9 . ▁▁ ▁President ▁of ▁the ▁United ▁States ▁Bar ack ▁Ob ama ▁nominated ▁Pf ann enst iel ▁as ▁Ass istant ▁Secretary ▁of ▁the ▁Navy ▁( Install ations ▁and ▁Environment ). ▁After ▁Senate ▁confirm