The Pottstown Mercury just released its 2012 “20 Under 40” list. Nominated by the Tri-County Chamber of Commerce, The Hill School’s Headmaster-elect Zachary G. Lehman is one of the young leaders who made this list. According to the Mercury, this list includes the 20 “exceptional professionals in the Pottstown area who have made a positive impact on their community and just happen to be under the age of 40.”