@ Incredible 1.
Field service like AC, DC etc is the real charm of PAS. If one doesnt want field, he/she will be posted as an SO in provincial/Fedreal secretariat. In secretariat, PAS and OMG officers do same work. After alot of hardwork and After getting PAS, if a person becomes a Section Officer, its better to choose another top 4-5 group like IRS, Customs, FSP or MLCG.