In 2006, he founded Adrian Smith + Gordon Gill Architecture (AS+GG), a firm dedicated to the design of high-performance, energy-efficient and sustainable architecture on an international scale. In 2008, he co-founded the MEP firm of PositivEnergy Practice, which specializes in the environmental engineering of high-performance, energy-efficient architecture. Before he started AS+GG, he was a Design Partner in the Chicago office of Skidmore, Owings & Merrill from 1980 to 2003 and a Consulting Design Partner from 2003 to 2006.