You have completed M.Tech in Biotechnology and of course it is a prestigious qualification. Now with this qualification there are different avenues of further proceedings. You may have a glimpse over it.
1) To start with, you can join a college with this existing qualification but in this case, you may not get salary as recommend by UGC but even then it would be better on your part for the continuation of such a job in order to meet financial obligations and at least you are not likely to tagged as unemployed. Side by side, start preparations for the NEET test conducted by CBSC held normally twice a year. By clearing this test, you will be eligible for the post of Lecturership in Biotechnology in a Government- college with a UGC scale. Later you can undertake a Doctorate degree in your relevant subject and in that way, your prospects may further widen.
2) The other areas are the research fields where you may get gainful employment like Glaxo, Hindustan- liver and other Government - organisations where you will work as Research - scientist and with enough exposure in this field, your growth - potential will tremendously enhance.
3) With reference to Biology teacher in a high school, I would not recommend because of the two factors - firstly, you need a B.Ed degree of a recognised university thus consuming your substantial time and secondly, your promotion - prospects in this job would not be that much rosy as compared to the posts mentioned in the earlier ones.