Rick Marini is CEO and founder of BranchOut – a startup bringing professional networking to your Facebook social graph. In just two years, the company has grown to boast in excess of 25 million registered users.

At the F.ounders event in New York City this week, we caught up with Marini to find out more about his startup, which is looking to harness the professional opportunities within our personal networks rather than those represented by the more traditionally work-focused LinkedIn.