Interested in Pursuing Corporate Career

I'm a senior graduating this December, and currently I'm interning at a merchant banking firm. However, recently, I developed an interest to get into corporate.
My major is finance, and I would like to get a financial analyst position, but I'm not competitive enough. So my plan is to work back office and work my way up.
I opened my fall schedule up to work part time, are there any and what kind of internships can I look for?