There are a number of competition exams. Life is the second name of competition if you are keen about career.
You may attempt PMS exams, which are expected in near future. There is always a need of Psychologists in Intelligence/ secret agencies, but the way of selection for such agencies are not same, but vary from case to case and agency to agency.
In our department i.e. CID we are going to have psychologists from Pakistan Army on deputation basis.
You may also apply for Armed Forces, if you are medically fit according to the standard.
Moreover, keep on visiting websites of PCS and FPSC, you may find any relevant exam soon.
Remember, ask the questions in relevant thread.
Hope your success in you CSS and all other competitions.

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Life is the name of competition.
Competition end, life end.