Salas O’Brien is once again recognized among the industry’s most respected rankings, reflecting the firm’s expanding impact and ongoing commitment to global excellence. In Engineering News-Record’s Top 150 Global Design Firms list for 2025, Salas O’Brien advanced to #62, up from #79 last year, marking another significant climb among the world’s largest design firms.

In the United States, Salas O’Brien has again been named to the Inc. 5000 list of fastest-growing private companies, marking its 13th consecutive year of recognition. The firm also broke into the top 5 on Consulting-Specifying Engineer’s MEP Giants list, reinforcing the team’s technical leadership in mechanical, electrical, and plumbing design.

These results highlight Salas O’Brien’s continued momentum and the trust placed in the firm by clients and communities to deliver solutions that create lasting impact in key markets worldwide.

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