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What We Do

We specialize in construction & engineering, staffing and defense solutions for leading corporations and governments around the world.

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Maintenance and Construction

Day & Zimmermann is a leading provider of maintenance and construction services for the power, process, and industrial markets. We deliver complex projects safely, on time, and within budget by leveraging wide-ranging capabilities, long-standing industry experience, innovative technology, and expert project teams

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munitions can assembly


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

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Government Services

Our Government Services division is a trusted provider of mission support solutions to government customers operating in complex and high threat environments.

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Workforce Solutions

Yoh is Day & Zimmermann's workforce solutions company and helps customers establish a strategic talent supply chain to address the complexities of managing cost, risk, quality, and value of the entire workforce.

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