When one hears the term public defender, people often imagine a court-appointed attorney standing next to a defendant in court. Jennifer Sellitti understands the perception. She’s been one of those lawyers for over 20 years, mostly in New Jersey. As New Jersey’s new Public Defender, though, she’ll work to explain the overall works of the office, which has 1,200 lawyers, investigators and support staff, which she described as, essentially, the largest criminal defense firm in the state. “I think there’s a huge opportunity for the Public Defender’s Office to play a larger role in public policy, …