Hello Corpers in d house, i need ur guidance and advice on how to go about this;

Recently i got a job as a teacher in one private secondary schl but i've not served yet. I will be due for service in March(Pending when ASUU and FG agree to call off the strike cuz my result is nt yet out). I want to serve where i'm presently teaching so the question is HOW DO I GO ABOUT MAKING SURE THAT I'M POSTED IN MY PRESENT LOCATION?
thanks in advance.