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ISO 9001:2015 Certified IPC 620 Certified Trainers and Application Specialists Canadian Controlled Goods Program Certification US/Canada Joint Certification Program NCAGE Member #L1160

Wire harness and cable assembly contract manufacturing for the defense industry

MRO specializes in subcontract manufacturing for prime defense contractors. We manufacture high complexity wire harnesses, military cable assemblies, and provide assembly for control panels, boxes, enclosures and racks. We also work with defense contractors to fulfill IRB/ITB Offset requirements, as well as ITAR requirements for US clients.

Learn More About Defense Solutions

What we do

Cable Assemblies

Rugged custom cable assembly manufacturing for a wide range of applications and industries, including Oil and Gas, Mining, Telecommunications and more.

  • Simple to complex designs
  • Overmolding available to improve durability
  • Automated equipment to ensure accuracy
Cable Assemblies

Wire Harnesses

MRO manufacturers custom wiring harnesses for the defense and industrial markets, with a focus on high performance and reliability.

  • Experienced in IPC620 Class 3 Manufacturing
  • Controlled Goods program for defense clients
  • ISO 9001:2015 for consistent results
Wire Harnesses

Control Panels and Boxes

We assemble control panel and control boxes for industrial and military applications at our secured manufacturing facility in Calgary, Alberta.

  • Agile manufacturing allows for design changes
  • IPC / ISO / UL / CSA Standards
  • Global sourcing of components
Control Panels

Electromechanical Assembly

We offer custom box builds, enclosures, front panels, and full system builds. Work with our design team to source components, saving you time and energy.

  • Global supply chain for components
  • IPC Class 2 and Class 3 Services
  • Integration with existing systems and devices


MRO offers overmolding for cable assemblies and other applications to improve the durability and lifespan of your cables.

  • Protects cables from harsh environments
  • In-house injection molding for quick turnaround
  • Custom molds for volume orders


Work with our design and engineering team to design your prototype. Take advantage of our years of engineering experience, our manufacturing knowledge.

  • Iterate and refine your design before production
  • Custom tooling shop on-site
  • Highly experienced engineering and design team

Who we work with

Our Capabilities

MRO is an enterprise manufacturer based out of Calgary, Alberta with offices in Edmonton, Alberta and Vancouver, BC. We have multiple production centers, including Controlled Goods production centers for military and defense clients. We also have in-house overmolding and CNC tooling to provide improved turnaround times. At MRO we are continually expanding and adapting our production capabilities to meet the changing demands of the industries we serve.

  • 10 Injection Molding Machines
  • In-house CNC Machines for custom tooling
  • Automated cutting, crimping, stripping and coiling
  • IPC 620 Class 2 and Class 3 certified trainers on staff
  • Large selection of connector, cable and wire options
Learn more about MRO