Unfortunately, I disagree with Sikander sahab on stance of ISI Recruitment!

Alhamdulilah, I have my own uncle as DD now and a friend recently joined as AD, they both doesnt belong to army background.
Induction in ISI as AD is purely on merit, yes you will encounter so many other vacancies there which are influenced by army personnels, I have heard so.

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'Never think that God's delays are God's denials. Hold on; hold fast; hold out. Patience is genius!