Olsson Inc. is one of the top 75 largest engineering and design firms in the nation. We ranked No. 74 on Engineering News-Record’s 2025 Top 500 Design Firms list, the eighth consecutive year that we have been ranked among the top 100 design firms.  

ENR determines its Top 500 Design Firms on revenue for design services performed during the previous year.

We made our first appearance on ENR’s Top 500 Design Firms in 1996 and first cracked the top 100 in 2018 at No. 98.