Hello Febin!

First of all shortlist the companies for which you fulfill the eligibility criteria(as they differ company to company) and then apply for the same by filling the forms. You have to read all the clauses of the respective companies mindfully before applying for sponsorship. They will probably ask you to take a test and then they will guide you further on your college training as well. Companies like SHELL and AET give scholarships. But I would suggest you to try for Anglo Eastern and other top companies where job security is ensured. Consider taking up a loan over joining through an agent. AMET university provides sponsorship for BSc others provide for DNS candidates. There are a few companies like Phoenix that provide sponsorship to BSc students, so be updated regarding that.

Hope this answer helps:)