DRDO stand for "Defense Research and Development Organization" is an apex institution of central government which co-ordinates the activities of many research laboratories spread across the country.

As you want here I am telling DRDO offered Summer Training program for B.Tech Biotech student, they receive innumerous requests in connection with the summer internship/industrial training/project work in their organization:

Process to Applying Summer training in DRDO

Update your Resume/CV

Write a Good cover email, you can get examples from WEB ” How to write good cover letters or email”

it is most important step, this step is the “research to get a research opportunity”. You need to get email id’s of the person to whom you have to apply

Contact all the seniors through your college or alumni who had previously done their training or Final year project at DRDO to get the valid email ID’s

Contact your professors in your college, if they know some one in DRDO to whom you can email your resume and cover letter

If the above two steps, dont work out and you dont have anything, then you have to start your quest on your own. How to do that.