Everyone you know is a part of your network
Some professors have relationships with employees or recruiting teams at companies that could help you get your name out there.
You can begin networking with friends, former teachers, coaches, mentors, church groups, or any contact/person you may know. Networking begins & grows with one telephone call...
Ask for professional recommendations in terms of local events you may want to attend, groups worth joining, industry associations you should look into, and other networking opportunities you’ve not already tried.
Putting yourself out there and introducing yourself to people will go a long way when you are looking for a job.
Your career center may also have a list of alumni they may be able to share with you so that you can proactively reach out to alumni that may have graduated with a similar major and are working in a field of interest to you.