A Randolph man could soon become a judge in the prominent Roxbury Division of Boston Municipal Court. Governor Deval Patrick nominated Serge Georges Jr. for associate justice, a seat that became vacant when Judge Shannon Frison was promoted to Superior Court. Patrick’s initial nomination of Frison to Superior Court was blocked when other judges complained she did not help during busy sessions and had taken time off to serve in the military, but the Governor’s Council later called the allegations baseless and approved her appointment. Georges has experience at several prominent Boston-area firms, including Barron & Stadfeld, where he became a partner. He also served as counsel for a start-up company before opening a practice in Quincy last year, and is president of the Massachusetts Black Lawyers Association. The Suffolk University Law School graduate now awaits approval by the Governor’s Council.