William D. Maddux retired as a Cook County circuit judge in January, but retirement didn’t work. “I’ve had a job since I was 9,” said the 79-year-old former presiding Law Division judge. “I’ve got to do something.” And he found something, returning to work as of counsel for Kralovec, Jambois & Schwartz. For the plaintiff personal-injury firm’s namesake partners, it’s a fitting result. Maddux hired all three a few years after launching the firm in 1979, when …