We are advancing and enhancing the fundamentals of modern productivity— talent, efficiency, and safety.

Engineering, Construction & Maintenance

Day & Zimmermann helps industrial plant owners in the Nuclear, Fossil, and Process industries lower their total cost of ownership by delivering innovative engineering, construction, and maintenance services and solutions.


Day & Zimmermann plays a vital role in the defense sector by manufacturing, storing and demilitarizing a wide variety of ammunition products and providing related services to customers in the U.S. government and approved foreign countries.

Government Services

We are an integrated provider of global security, critical infrastructure solutions, and architecture and engineering services to the U.S. Government and commercial clients.

Workforce Solutions

We provide the talent needed for the jobs and projects critical to our client’s success.

Engineering, Construction & Maintenance

Vertically-Mounted, High-Pressure Feedwater Heater Replacements

Technical expertise, welding and rigging partnerships, and a managed-task approach saved a customer more than $2 million on two challenging feedwater heater replacements.

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Diversity & Inclusion at Day & Zimmermann

Our Diversity Vision

To be a company that embraces diversity, is inclusive, and thrives on learning so that our employees feel respected and invited to contribute to the success of our company, clients, suppliers and communities.

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We are Many, Diverse Voices of Betterment

Our People

The best way to learn about life at Day & Zimmermann is to hear from the people who are living it. Meet the people behind our success.

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“I am excited to be part of an amazing organization and work with colleagues who share the same values as I have.”


Workforce Solutions

Yoh Provides Workforce Solution to SAP, a Global Technology Company

We can provide visibility and control over a complex contingent workforce.

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Find Job Opportunities at Day & Zimmermann