PJ Dick, the region's second-largest construction company, is opening a new office in the Philadelphia area, leasing a 10,000-square-foot space in Exton, Chester County. The new office will be led by regional manager Gary Heinerichs and regional operations manager Wayne Schrader, starting with a staff of five as the company works to build a base of business in the eastern half of the state as well as in northern Maryland. Clifford R. Rowe Jr., PJ Dick's CEO, described the expansion as a "natural…