Kimley-Horn, AECOM, WSP, Salas O'Brien, Thornton Tomasetti, LANGAN, IMEG, EXP, and DeSimone Consulting Engineering head Building Design+Construction's ranking of the nation's largest multifamily housing sector engineering and engineering/architecture (EA) firms for 2026, as reported in BD+C's 2026 Giants 400 Report.

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