sdi is a consulting engineering office committed to bringing exacting structural engineering assistance to architects and building professionals. Anthony Greco PE and Paul Dannels AIA, combining their engineering, construction and architectural expertise, founded the firm in 1991. The office has since grown to a team of structural engineering specialists all devoted to addressing the needs of architectural clients.

At the University of Michigan sdi has consulted on dozens of buildings including the LEED Gold Certified Dana Building which was nationally recognized by the American Institute of Steel Construction for innovative structural engineering. At the University of Michigan Athletic Campus sdi has engineered numerous buildings including the 1998 Stadium Expansion with Venturi, Scott Brown Associates of Philadelphia, and the 2010 Stadium Expansion with HNTB of St. Louis, Missouri.

At Cranbrook, in addition to engineering numerous historic restorations to the buildings on the renowned Eliel Saarinen campus, and many art installations as well, sdi was the structural engineer for the Academy Studios designed by Pritzker Award winning architect Rafael Moneo of Madrid, Spain, and the Science Institute West Entry designed by Studio Ma of Phoenix, Arizona.

Many architectural clients in or around the cities of Detroit, Ann Arbor, Lansing and Grand Rapids find sdi to be a nearby and effective member of their design teams; whether their projects are in Michigan, or across the country. Architects outside of Michigan likewise find sdi to be a valuable partner, especially when working with Michigan clients.