Operations & Maintenance

Day & Zimmermann brings nearly a century of successful operations and maintenance (O&M) solutions experience to our customers here at home and around the world.

With robust capabilities in Facility Management and Operations, Explosive Ordnance Storage & Disposal, International Logistics, and Heavy Maintenance, Repair and Overhaul (MRO) Services, we custom design our solutions to address each project's unique needs, including those in austere high-risk and secure environments. 

Day & Zimmermann performs initial site surveys, designs, builds, repairs, and maintains the full range of infrastructure necessary to support your mission.

Whether it’s operating, maintaining or repairing an existing facility and government assets, or delivering for the needs of tomorrow, we tailor our solutions to meet individual customer needs.

For more than seventy years, Day & Zimmermann has successfully delivered O&M and Base Operations Support Services to the Department of Defense (DoD), Homeland Security, and other government agencies. With a proven track record spanning multiple DoD locations, managing facilities operations for the U.S. Army, U.S. Navy, and U.S. Air Force. Day & Zimmermann has performed all aspects of base operation support services including equipment and vehicle maintenance, work management, facility maintenance, supply services, ammunition operations, explosive ordnance storage and disposal, and transportation management. Our comprehensive approach has been proven at the largest munitions depot in North America for the U.S. Department of Defense, at various high-hazard facilities for the U.S. Department of Energy, and for multiple governmental and non-governmental organizations doing business in Southwest Asia, Africa, and the Pacific Rim.

The strength of our Operations & Maintenance (O&M) business is tied directly to our values of safety and integrity, and the reach and expertise of our global organization. These values drive how we manage, perform and deliver for our customers. With global supply lines and infrastructure, we stand ready to support our clientele around the world.


With global supply lines and infrastructure, we stand ready to support our clientele around the world. These service offerings include:

Success Stories

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Featured Story

Ordnance Management and Operations and Security for Largest Global R3 Demilitarization Complex

SOC is the operating contractor for the U.S. Army’s facility with the largest capability for premier R3 (resource, recovery, and recycle) ammunition storage and demilitarization in the world. Since 1980, SOC has successfully managed ordnance operations including demilitarization of conventional ammunition, ammunition supply and storage operations, with facility support services, environmental services, program management, and security, installation security, fire and emergency services at this Government-Owned Contractor-Operated (GOCO) facility supporting the Joint Munitions Command.

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