Clark Dietz, Inc. has once again earned a place on the Engineering News-Record (ENR) Top 500 Design Firms list, ranking No. 450 in 2026. The continued recognition reflects the firm’s steady growth, long-standing client relationships, and the work happening across communities throughout the region.

Published annually, the ENR Top 500 ranks U.S.-based firms based on revenue from design services performed during the previous year. The list is widely recognized across the engineering industry as a benchmark of growth, performance, and industry impact.

For Clark Dietz, remaining on the ENR Top 500 reflects the collective efforts of employees across every office and discipline. From transportation and utility improvements to water and environmental projects, the firm continues to support infrastructure that communities rely on every day.

“Our continued presence on the ENR Top 500 is a direct reflection of our people and the work they do every day,” said Wes Christmas, PE, MBA, CEO of Clark Dietz. “We are focused on sustainable, responsible growth — growing in a way that creates opportunity for our staff, strengthens our relationships, and helps the communities we serve function better, safer, and more reliably every day.”

With offices throughout Illinois, Indiana, Kentucky, Michigan, and Wisconsin, Clark Dietz provides engineering and construction engineering services across transportation, traffic, bridges and structures, water, wastewater, stormwater, civil and environmental engineering, and mechanical and electrical design.

The firm’s continued recognition on the ENR Top 500 reflects a consistent focus on practical infrastructure solutions, responsive client service, and steady regional growth. While the ranking is an important milestone, it also represents the relationships, collaboration, and day-to-day work behind projects that improve how communities function.

For more than 65 years, Clark Dietz has partnered with municipalities, agencies, and local organizations to help plan, design, and deliver infrastructure projects that support everyday life. As the firm continues to grow, its focus remains rooted in providing dependable service and building strong communities through engineering.

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