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Maintenance and Construction

Day & Zimmermann® helps plant owners in the Power, Chemical, and Industrial markets lower their total cost of ownership by delivering innovative maintenance and construction 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

Day & Zimmermann® is an integrated provider of global security, critical infrastructure solutions, and architecture and engineering services to the U.S. Government and commercial clients.

Workforce Solutions

Day & Zimmermann® provides the talent needed for the jobs and projects critical to our client’s success.

Maintenance and Construction

D&Z increases engineering productivity while reducing costs

Day & Zimmermann was awarded engineering work at a specialty chemical manufacturing company and provided preliminary P&IDs, piping and valve specifications, along with electrical and instrumentation design.

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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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One of the most challenging, and rewarding, parts of my job is building a high-performing team. The diversity of the team is critical to bringing innovation to the project and delivering success.




Government Services

Design of Top U.S. Law Enforcement and National Security Training Complex

Mason & Hanger®, A Day & Zimmermann Company, performed architectural and engineering services for this new 426-acre campus built to test new Tactics, Techniques, and Procedures (TTPs) to meet the asymmetric threat that soldiers find on the battlefield. 

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