In addition to the large group of BT engineers and architects in Washington, DC, the Washington, DC SE Division benefits from easy access to SGH’s national team of experts including analysts, structural engineers, geotechnical engineers, civil engineers, fire engineers, materials scientists, chemists, petrographers, and architects. Simpson Gumpertz & Heger (SGH) is a multidisciplinary, national engineering firm of trusted consultants and technical experts offering services in structures, building enclosures, advanced analysis, performance & code consulting, and applied science & research.