Chicago Big 4 Internships

I’m a junior at DePaul University in Chicago. I transferred after two years at a community college. I now have a 4.0 GPA with two work experiences, one as a file room worker and currently am an Office lead. I am in a five year program so hopefully will be getting my Macc in 2017 when i will also be CPA eligible. Since i was not at DePaul i never had any networking opportunities. I got immediate rejections from all the big 4 when i applied in September for their 2015 summer internships. Is there something i’m doing wrong?

You did nothing wrong. Try the second tier as well.