As you want to get the details of Army jobs after 12th standard without PCM so here is the information of the same for you:

Mostly PCM is required at 10+2 level for getting a job in Indian Army.

But still there will be requirement where PCM is not required.

I would like to suggest you that every week do read Employment Newspaper because it carries publishment of lots of job opportunities after 10+2 where PCM will not be required.

You can go for the NDA exam as this is best option after 12th if you want to get a job in Indian Army