You can make a career in lectureship and Research program (Teaching) through CSIR NET the exam is conducted every year for Science Students.
You will also get JRF Scholarships worth INR 25000 per month.
You need to complete your post-graduation first. The exam is conducted in various subjects including Life Science, Chemical Science, Physical Science, Earth Science etc.
Visit the official govt. site to know the CSIR UGC NET Syllabus
Hope that helps!