Mars rules the 10th house of your natal chart, therefore chances of you in the above career are very much there. Mars in the 4th house aspects the 10th house. Its just that you are in the main period of Rahu, and things will not be easy for you to achieve without efforts. Chances are strong before March 2018. Keep working hard and surely you can do it.
Generally all PSC exams though conducted in a given year, the rank list will be published much later. And it normally takes 2 to 3 years after to get a posting after training. Have confidence and you are always guided by God if it is part of His assignments to you.
Dear Sir I m preparing for exams at home only not at coachings centers I m working hard a lot but luck not favours as I have money prblm too that’s why I not joined any coaching and I m elder in home so doing job also that’s why I loose confidence I doing my best but luck nit favouring.
Luck favours you when you need it most and you do not have to run after it. It will come to you at the most appropriate time. Carry on with your preparations and you will be blessed with what is best for you. Even Arjuna had lost confidence before the Mahabharata war started. So you are not alone in this world in this regard. Krishna in some form will be there to guide you.