Craig C. Burton, BEng, a sustainable design consultant and high-performance building modeler with eight years’ experience working in the U.S. and United Kingdom, has joined PositivEnergy Practice to lead the Clean Technology Team. Founded in early 2010, PositivEnergy Practice (PEP) now has 22 employees. The firm, which is based in Chicago, conceives, designs, implements and manages energy performance, resource management, and carbon reduction strategies.