Though I dont know you but being a Muslim brother I would like to advise you not to join the SBP as your whole career will be in the banking sector which I dont think will be a fair deal. As the Banking job is clearly forbidden in Islam so in my opinion you should avoid the sbp job and if u did this then I am 100% sure that you will get better job than this one INSHAALLAH. Now it is upto you to decide. Thanks