Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additional countries. We have offices in Boston, Chicago, Houston, New York, the San Francisco Bay Area, Southern California, and Washington, DC.