Building the strength of governments and armed forces worldwide

At any time, in regions throughout the world, Day & Zimmermann people are providing mission critical services to the U.S. Departments of Defense and Energy and U.S.-approved foreign governments. Munitions products and services. Security. Engineering services. Construction. Operations and maintenance. Regardless of the services provided, our sole objective is to deliver the resources needed to meet the demanding requirements of our customers.

Architecture, Engineering & Construction Services – is a leading provider of engineering services and delivers design-build, EPC, modular construction, contract maintenance, and program management services for the U.S. government and defense industry.
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Munitions & Government Services –  manufactures, stores and demilitarizes ammunition products and provides related services to the Departments of Defense and Energy and to United States-approved foreign governments and delivers facilities maintenance services to municipal, state and federal government agencies.
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Munitions Logistics & Demiliarization > 
Munitions Products >

Security Services – is a leading supplier of highly-technical, sophisticated protective services for sensitive government installations throughout the United States.
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Talent & Outsourcing Services – the nation's first technology staffing firm, Yoh provides specialized staffing services to municipal, state and federal government agencies, as well as the overall defense industry.
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