AECOM, Stantec, Gensler, Perkins&Will, HOK, Skidmore, Owings & Merrill, DLR Group, and HDR top Building Design+Construction's ranking of the nation's largest government building sector architecture and architecture/engineering (AE) firms for 2026, as reported in BD+C's 2026 Giants 400 Report.

Source: Building Design+Construction's 2026 Giants 400 Report