During the school year students are more likely to have a job working in a lab on campus then one out in the community. For summer jobs in the sciences students try and find a gig at places like the NIH although of course these are not going to be easy to come by. You might want to see if you can find any current students and ask them about how hard it is to get jobs and will have some campus.
As far as that grad degree goes, spend a few minutes looking up PhD glut online. The applications are in mixed bag for you. It means many colleges are going to have professors that attended top schools as they try and find a job anywhere they can. A key to getting into grad school is strong recs from your professors so if you do the aforementioned well I have work as well as get to know some profs during office hours then you will be a strong candidate no matter where your undergraduate degree is from.