How can MCA people apply for ISRO/DRDO as s post of engineer? What types of exams are there in ISRO/DRDO

Post number wise essential qualification as follows:
• Scientist / Engineers SC
1. M.Sc / M.Sc (Tech)/ M.Tech in Geophysics/ Applied Geophysics with First Class with 65% marks above.
2. M.Sc/ M.Sc (Tech)/ M.Tech in Geology/ Applied Geology with First Class with 65% marks above.
3. M.Tech in Geoinformatics / Remote Sensing and GIS with First class
4. M.Tech in Optics / Applied Optics with First class.
5. M.Tech in Physical Engineering, Engineering Physics, Semiconductor devices, optoelectronics with first class
6. ME in Electrical/ Microwave Engineering with specialization in RADAR engineering with first class
7. M.Tech in integrated Circuit technology / solid-state technology/ Microelectronics/ Micro-fabrication with first class or M.Sc Physic with Physics of thin films technology as specialization with first class with 65% marks or more.

• Scientist Engineer SD
8. PhD n Physics/ Applied Physics/ Mathematics/ Applied Mathematics
9. Ph.D. in Coastal Ecosystems / Ecology/ Botany/ Environmental Sciences/ Ecology with First Class with 65 % marks or above plus 4 years research experience in the field of coastal ecosystems / coastal zone management/ costal ecosystems modeling