Jacobs, AECOM, Kimley-Horn, Burns & McDonnell, EXP, Thornton Tomasetti, SSOE, Woolpert, and STV top Building Design+Construction's ranking of the nation's largest engineering architecture (EA) firms for nonresidential buildings and multifamily buildings work, as reported in BD+C's 2026 Giants 400 Report.

For more AEC discipline rankings, check out:

• Top 400 Building Design Firms (includes all A, AE, E, EA firms)
• Top 200 Architecture Firms 
• Top 90 Architecture Engineering Firms 
• Top 80 Engineering Firms
• Top 160 Contractors
• Top 80 Construction Management Firms

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