Hello Aspirant ,

DRDO is a highly reputed institute which mainly focuses on scientific and technological  research and development in the area of defense and security. But they do have few other wings such as DRDO-DRL (Defence Research Laboratory), DRDO-DFRL (Defence Food Research Laboratory) and DRDO-DIBER (Defence Institute of Bio-Energy Research) to cater to research in life science areas. Hence , you may become a scientist there by starting as a junior research fellow with MSc Zoology . For that you must clear the NET exam with a good score. After clearing the exam keep checking for their job advertisement for this post. Once they announce , you may appear for the walk in interview. The age limit is 28 years with an extension of up to 5 years if you belong to SC/ST category. Checkout their official website and the NTA website for more information .

All the best