What design features make a highway safer? How can a small town provide clean drinking water on a limited budget? Can a manufacturer get its new products to market more quickly and still reduce its carbon footprint?

SEH is an employee-owned engineering, architectural, environmental, and planning company that helps government, industrial, and commercial clients find answers to these and other tough questions.

In June 2014, SEH and Yaggy Colby Associates merged companies. "Our Company operates as SEH," said SEH CEO/President Sam Claassen. "We believe that together we're better - more services for clients and more opportunities for employees."

Our 700 employee-owners share a common goal: Building a Better World for All of Us®. This approach reflects a company-wide commitment to improving the quality of life by designing safer, more sustainable infrastructure for local, state and federal units of government, and helping industrial and commercial clients achieve their business goals. You'll find our clients spread out across the United States — with evidence of our work in 42 states.

Our Values

Honesty and Integrity
We speak and act with honesty and integrity with one another, our clients, and the public.

We treat one another, our clients, and the public with respect. We think the best of one another. We value others and their opinions.

Our business is meeting the needs of others. We will meet those needs on schedule and create lasting, sustainable value for our clients.

We take responsibility for our words and actions.