Hi Sai,

Yes, absolutely you can do teaching assistantship and private M.Tech simultaneously. It fully depends upon the type of M.Tech you want to persue. If you are persuing part time or distance learning M.Tech programme, you can easily do your teaching job without any obstruction but if you opt for regular course, you will not be able to get enough time to balance both equally.Else rest everything depends upon you weather you can handle it simultaneously or not.

Hope it helps.!!

Good Luck..!!