Last month on the lush rooftop of the Delancey, a group of youthful New Yorkers gathered for a good cause. It was a summer kickoff event hosted by the “Innovator’s Guild,” University Settlement’s new organization for young professionals. Katie Sexton (pictured, third from the left) is a driving influence behind the fledgling group. A recent college graduate, she also happens to hold a seat on the board of directors of this country’s oldest settlement house. Recently, we chatted with Katie about her path to the boardroom, and about helping to lead one of the Lower East Side’s most venerable social service institutions.