Arthur Grim is currently the chairman of Pennsylvania's Juvenile Court Judges' Commission and a member of the Juvenile Justice and Delinquency Prevention Committee to the Pennsylvania Commission on Crime and Delinquency. Previously, he was a judge of the Court of Common Pleas of Berks County, Pennsylvania, and served as administrative head of the juvenile court from 1987 to 2007. In the wake of the Penn State–Jerry Sandusky tragedy, he was appointed by the governor as the judicial representative to the statewide Task Force on Child Protection.
In February 2009, Grim was chosen as special master by the Supreme Court of Pennsylvania to review all juvenile cases presided over by a judge who had improperly committed juveniles to two detention facilities and denied juveniles their constitutional right to counsel in one of the most egregious violations of public trust in the history of American juvenile justice. As a result of Grim's findings and recommendations, the Supreme Court entered an order expunging the records of more than 3,000 juveniles.
Grim taught as an adjunct professor at Alvernia University and at St. Joseph University, and also served in 2010 as a Yale Law School–China Law Center visiting juvenile justice consultant in China. He gathered and led a broad and committed group of community leaders for the Berks County Disproportionate Minority Contact Reduction Steering Committee and has served on the Governor’s Cabinet on Children and Families since 2005.