Mark D. Webster, PE and LEED AP BD+C, is a structural engineer in the Boston-area office of Simpson Gumpertz & Heger Inc. (SGH). Mr. Webster has twenty-five years of experience in the design, analysis, and investigation of concrete, steel, masonry, and wood structures. His lifelong concern for the health of the natural environment has led him to investigate the intersection of sustainability and structural engineering practice. He has written and lectured on topics such as the practical measures structural engineers can take to improve the environmental performance of their designs and the life-cycle environmental impact of building structural systems.