Top 40 Engineering Architecture Firms for 2026

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.
By David Barista, Editorial Director
Aug. 21, 2026
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Photographer: Nick McGinn
Photographer: Nick McGinn

Pictured: TriStar Summit Medical Center Tower Expansion, Hermitage, Tenn., designed by Barge Design Solutions and built by Layton Construction. Photographer: Nick McGinn

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:

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

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