The number of women in leadership roles has remained small across the profession, but one firm is enjoying — and celebrating — the successes its female attorneys have brought as first chairs at trial.Despite more women entering the legal profession, representation in management positions in cases and at firms has lagged. A research report conducted by the American Bar Association randomly sampled cases filed in the U.S. District Court for the Northern District of Illinois in 2013. They found just 13 percent of …