Hello Vrushali

(Research): After doing a PhD, post your BS-MS course, you can join any CSIR labs or University or research lab as a staff scientist or principal investigator.

(Teaching): The IISER graduates can take up a teaching job in any school/University after qualifying the requisite exams like UPSC, B. Ed, NET, etc.

Industry (Research & Development): Doing a PhD after your BS-MS course will open the doors of any company for you to join them as a scientist in their R&D department. To achieve this, ensure that you do your summer research projects in industries.

Industry (Sales/Management): After completing your Ph. D, you can do an MBA or a business related course and join the sales or marketing team of any reputed organization. Again, ensure that you do your summer research internship in industries.

Scientific Writing: You can explore opportunities in journals like Cell, Science, Nature, etc. as an editor. You need a PhD and training in scientific writings.

Teaching: After completing your BS-MS, you can teach at coaching classes like FIT JEE, etc. This is considered a lucrative job as the pay packages are good.

Legal Advisor: After your BS-MS, you can work as a legal advisor or administrator in biotech companies or Universities. Doing an MBA or Masters in Law will help your cause.

Patent Officer/Grant Writer: For a patent officer, you need to take up a law course on patent filings, etc. You can also take a legal course on forensic sciences and join CBI or other police forces as forensic expert/advisor. Grant writers need a PhD after their BS-MS.

Be your own boss: If you can invest a little then you can start your own coaching classes or a consultancy.

Government Services: You can apply for different positions in various ministries as they recognize MS degree given by IISERs. You can also appear for administrative exams for IAS, IPS, etc. positions.