Top 80 Engineering Firms for 2025

WSP, Fluor, Salas O'Brien, IMEG, Jensen Hughes, LANGAN, and NV5 Global top Building Design+Construction's ranking of the nation's largest engineering firms for nonresidential building and multifamily housing work, as reported in BD+C's 2025 Giants 400 Report.

By David Barista, Editorial Director

Sept. 15, 2025
Photo: Jeremiah Hull Photography, courtesy WSP
20-story Arthur M. Blank Hospital at the Children’s Healthcare of Atlanta’s North Druid Campus Photo: Jeremiah Hull Photography, courtesy WSP
The 20-story Arthur M. Blank Hospital at the Children’s Healthcare of Atlanta’s North Druid Campus includes 446 patient beds, 69 emergency exam rooms, and 19 general operating rooms. It is the only dedicated Level 1 pediatric trauma center in Georgia. WSP was the Engineer of Record for building systems as a consultant to architect Earl Swensson Associates. Photo: Jeremiah Hull Photography, courtesy WSP

WSP, Fluor, Salas O'Brien, IMEG, Jensen Hughes, LANGAN, and NV5 Global top Building Design+Construction's ranking of the nation's largest engineering firms for nonresidential building and multifamily housing work, as reported in BD+C's 2025 Giants 400 Report.

For more AEC discipline rankings, check out:

Source: Building Design+Construction's 2025 Giants 400 Report

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