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We are motivated by a collective passion to improve quality of life, delivering infrastructure solutions that have a positive impact on people, the natural environment, and the economic well-being of our community partners. This takes a balanced approach and committed people working together to bring your vision to life. We are engineering more than infrastructure; we are engineering quality of life.

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At the heart of our organization is an experienced and driven engineering team. Because we bring a powerful combination of local knowledge, strong community relationships and technical expertise, you can rest assured your vision will be realized. We deliver on the promised. Every time.

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Client Service

Clark Dietz has a long history of providing responsive service and innovative solutions to clients vested in the success of the built environment. Our firm was founded over sixty years ago, and continues to stand on the principles of clients first, integrity in practice, and a strong and honest work ethic. We believe that every experience you have with us should be nothing short of exceptional.

Our Leadership

John I. Boldt, PE 
CEO/Chairman of the Board

Charles E. Craddock, PE
President/Chief Operations Officer

Jerald T. Payonk, PE
Executive Vice President/Director of Engineering


Our Clients

“Clark Dietz has become a trusted partner in providing infrastructure to meet the current and future demands of our growing community. We have come to trust their integrity, timeliness and ability to complete our projects with an exceptional level of service and quality. I highly recommend Clark Dietz to municipalities that have a long-term vision for their communities and are seeking a partner who understands their growth objectives.”

Wayne Aldrich, PE, Director of Public Works

“One of the primary benefits of working with Clark Dietz is the field knowledge that their designers possess. I have found continuously that project designs and project schedules are implemented without much complication. Their knowledge of materials, process, and IDOT standards is demonstrated in the product they provide. Their attention to detail and ability to resolve issues promptly and quickly avoids costly change orders…”

Todd Baker, Superintendent
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Our Culture

We Make a Difference

We understand how vital infrastructure is to people and we never forget its importance to those who rely on it. Our ultimate reward comes from collaborating with our clients and generating solutions that provide real benefit to people’s everyday lives.


We Give Back

Our world is stronger when we work together. Volunteering our time, expertise, and leadership to communities around the globe help create stronger, healthier places for people and the planet.


We Embrace Diversity

The diversity of our team infuses our culture with the spirit of innovation. Our collaborative environment respects everyone’s unique perspective and promotes individual and team growth. That means better people, solutions, and service to our clients.