Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our building enclosure projects encompass contemporary and existing facades, waterproofing, and building science. SGH helps clients integrate and implement these systems for enhanced performance, reliability, cost, and other factors. Our team members include engineers, architects, scientists, and many other technical professionals. We have more than 600 employees in seven offices: Boston; Chicago; Houston; New York; San Francisco; Southern California; and Washington, DC.