The work is important to Lauren Holtkamp. Not just the work you see, when she patrols NBA courts as a referee, but also the work before and after game time: the weekly quizzes on league rules, the collaborative study of their application to various unusual scenarios, the exacting film dissection in the hours after a game. It’s that work that empowers her to perform during those most visible two-hour exhibitions, that get her on the court in the first place. It’s that moment—when she first takes the floor—that retains all its magic, even after hundreds of games. “There is a sense of coming home,” Holtkamp says.