Dear Aspirant,

DRDO is also known as the Defense Research and Development Organisation and it is a national level government organisation. The working of the DRDO is based upon the design of Defence systems and their reliability and development which is connected to the production of superlative weapons which are required by the Defence Ministry to guard the country fulfilling the qualitative requirement. It deals with military technology in various areas like aeronautics, armaments, combat vehicles, electronics, instrumentation engineering systems, missiles, materials, naval systems, advanced computing, simulation, and life sciences. For selecting Junior Research Fellows, a national level entrance exam is conducted by DRDO once a year.

Centre for Personnel Talent Management (CEPTAM) recruits individuals in many sectors through an exam. It is a national exam which happens once a year. Every post has a different eligibility criteria. You with yours can apply for STA 'B' post with Chemistry, Mathematics and Physics. The Technician 'A' posts require you to have certain certificates pertaining to every post dealing with specific alterations. You can also apply for A&A cadre as they require the candidate to have passed in class 10th or 12th.

Hope this helps. All the best!