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Operations & Maintenance (O&M) Solutions

Within our family of Day & Zimmermann Companies, collectively, we understand the complex infrastructure needs and risks, when working in remote, austere, and at times, high threat areas —we have been operating in those environments for decades. 

Our experienced team provides world class expertise and capabilities by offering a full suite of tailored turnkey solutions, from the design phase to implementation to sustainment. SOC is an O&M industry leader in program operations, maintenance, security, procurement/supply chain management, transportation, Host Nation Sustainment, Tactical Vehicle and Aircraft Maintenance, Repair and Overhaul (MRO), logistics support, training, and fire and emergency services.

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Tactical Vehicle and Aircraft Maintenance, Repair, and Overhaul (MRO)

Through our critical aviation maintenance planning and execution, technician staffing, maintenance priorities and pre-flight readiness inspections, we have more than 20 years of experience providing extensive no-fail Systems Readiness & Sustainment services to the Air Force and Navy aviation fleets, including Army rotary wing platforms OH-58, CH-47, AH-64, & H-60. While successfully serving a variety of government customers including the Department of Defense, Army, Navy, Air Force and other U.S. Federal Agencies, we provide:

  • Tactical Vehicle and Aircraft Maintenance, Repair, and Overhaul (MRO)
  • Host Nation Sustainment, Logistics, and Training 
  • Organizational, Intermediate, & Depot Level Maintenance
  • Depot Service Including Modifications and Upgrades 
  • Deployable Contractor Field Teams

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Supporting the Evolving Needs in Ukraine and Surrounding European Countries

SOC is supporting the Mission in Ukraine with teams, resources, supply channels, and requirements in place — also in-country. We have forward-operating teams with offices, housing, staff, and supply chains in strategic locations of Ukraine—positioned to support the ongoing mission-critical needs, as a one-stop resource with seamlessly integrated solutions. We have relationships with local business partners in-country/in-region.

Currently providing logistics services moving materials, supplies, and mission-critical resources into Ukraine. We have been supporting the U.S. National Security Mission on thousands of projects, in 165 countries. We have strong working knowledge in Eastern Europe, having supported and designed a number of U.S. Government Facilities in numerous countries across Europe, including designing of the U.S. Embassy Compound in Ukraine.

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Logistics Support

In support of our clients, we have provided a robust logistics models (Internal and External), supply networks and infrastructure that span the globe.  SOC’s capabilities have delivered a cost-conscious, flexible, and innovative approach to supply chain management, contingency operations, air transportation, fleet transportation, vehicle maintenance, and local procurement.  Our logistics management program is grounded in firm adherence to ITAR, legal compliance, and quality standards.



SOC has developed and maintained a wide range of operational training programs proving training for more than 5000 personnel per year in both CONUS and OCONUS locations.


  • Vehicle and Aircraft Maintenance
  • Explosives and Munition Handling
  • Transportation
  • Security and Weapons Platforms
  • Anti-Terrorism and Force Protection
  • Safety and Environmental Compliance
  • Fire and Emergency Services
  • Host Nation Sustainment, Logistics, and Training


Years Supporting the Department of Energy at Category I Special Nuclear Material research, development, and manufacturing environments


Years supporting Department of Defense, munitions productions, facility design and maintenance, demilitarization operations and research and development


Years of Continued O&M Services for Army Joint Munitions Command for the largest capability for premier ammunition storage and demilitarization in the world