DRDO has released notification for Junior Research Fellow Opportunities in 3 areas of research like Food Science and Technology, Chemistry with specialisation in Instrumentation and Bio-Chemistry/Medical BioChemistry. The educational qualification for these 3 positions is M.Sc/M.Tech with 1st class and relevant NET and GATE score. But with B.Voc as your educational qualification you are not eligible. You need to hold a Master's degree for being eligible for the post of a JRF.