It really depends on why do you think you are going to join MOD.The exact nature of the job can only be found out after you join it.However,an AD in MOD will perform different roles,ranging from admin to some duties which demand the ultimate sacrifice.Few days back an AD MOD was martyred in Balochistan.So you should keep in your mind all the aspects before joining.If you are deeply passionate about serving the motherland then this job is for you.Personally I feel we all have to go someday in our graves;it is much better to go honourably as a martyr than as a sick old man turning in his bed.In addition to that this job will most probably have long working hours.Everyone has to think about his/her own situation before taking a major decision.Best of luck whichever way you head for brother.