change department category

sir'
respected you
sir mera chayan anukampa ke thath railway mai fitter g pe artisan skiled mai kiya gaya jo 10 feb 2015 se duty join kiya hu .meri qulification BA graduete hai..fhir bhi mera chayan western railway ke lower parel cwm tranning 3 saal ke liye diya hai..
mera sawal hai ki mai ye fitter g artisan ko catgary change kar sakta hu mujhe clerk ya booking clerk mai jana chata hu kya abhi change kiya ja shakta department...please solve my problam