Hello there,
Most of the colleges have placement cell and a in-charge for that who acts as placement officer, for any a student who need a job, he is the official contact for them, the same for any a company who requires freshers or interns; they must have to contact the placement officer and can submit their company profile and seek for off-campus interview date.
Most of the placement officers will come to corporate for jobs to their students, the same way you can also approach.