Capabilities Overview

MRO Electronic Supply manufactures IPC/WHMA-A-620 Class 2 and Class 3 custom cable assemblies, wiring harnesses, overmolded cable assemblies, and box builds for the defense industry and other industries operating in extreme conditions and Class 1 Div 2 environments.  We are vertically integrated to support our customers from prototypes to production volume orders.  We design and cut mold tooling in house with our CNC machines.   Rapid turnaround time and expert quality makes MRO the best choice for overmolded cable assemblies.  Exceptional quality and on-time delivery for complex wire harnesses makes MRO the best choice for the defence industry.  MRO leverages incredible product and supply chain knowledge  to deliver the most price competitive options with the fastest delivery times.   A huge inventory of connectors, wire and cable, heat shrink, chemicals, tools, antennas and other electronic components is a major advantage for our customers.

Certifications and Regulatory Compliance

ISO 9001:2015

MRO is an ISO 9001:2015 certified company from SAI Global Assurance for the scope of Manufacturing of low, medium and high complexity custom cable assemblies and wire harnesses, including radio frequency (RF) coax assemblies, power, data and control cables and rugged over-molded cable assemblies for various industry sectors such as Oil & Gas, Mining, Agriculture, Robotics, Forestry, Transportation,  DockSide/Marine, Automotive, Surveillance, Remote Monitoring, Law Enforcement, Security, Telecommunications, Autonomous Vehicles, Tech and Defense. A copy of our ISO Certificate of Registration, valid until September 10, 2024 can be downloaded here.


MRO operates with IPC/WHMA-A-620D Certified Trainers and Application Specialists, with continuing training for all certified employees to ensure compliance with the latest revisions to the standard. We are an IPC Class 2 and Class 3 EMS Provider.

IPC Class 2: Dedicated Service

Includes products where continued performance and extended life is required, and for which uninterrupted service is desired but not critical. Typically, the end-use environment would not cause failures.

IPC Class 3: High Performance/Harsh Environment

Includes products where continued performance or performance-on-demand is critical, equipment downtime cannot be tolerated, end-use environment may be uncommonly harsh, and the equipment must function when required, such as life support systems and other critical systems.


MRO is registered with the CGP and is therefore eligible to receive technical data on various defense articles as permitted under the ITAR Canadian Exemption. MRO’s CGP registration number is CG19448 and a copy of its registration certificate, valid until April 10, 2024 can be downloaded here. MRO’s registration status can also be confirmed through a search of the CGP registration database, available at, and by telephoning the CGP information desk at 1-866-368-4646 or via e-mail at [email protected].


MRO is also certified pursuant to the U.S./Canadian Joint Certification Program (“JCP”). Under the JCP, MRO is certified to receive technical data governed, in the U.S., by U.S. Department of Defense Directive 5230.25 and, in Canada, by the Technical Data Control Regulations (subject to compliance with U.S. and Canadian export and import control laws). MRO’s JCP Registration number is 0081550 and its certification is valid until August 6th, 2024.

MRO views compliance with ITAR, U.S. Department of Defense, and Canadian Department of National Defence requirements as a priority. Its export controls compliance program includes:

  • Secured network systems that restrict access to ITAR controlled technical data
  • Encryption of all ITAR controlled technical data
  • Physical security and access controls at all company facilities
  • Management commitment to ITAR compliance


MRO is registered under the NATO Commercial and Government Entity program. MRO’s registration number is L1160.


MRO’s primary business activities are classified under the NAICS with the following codes.

  • 335929
  • 335990
  • 33592

Testing and Quality Control

Every cable assembly, wiring harness and box build produced by MRO undergoes 100% testing before shipping.

  • Flex/Bend
  • Pull/Tensile Strength
  • Low Voltage
  • High-Pot AC/DC – up to 1500 DC and 1000 AC
  • Component Value (Resistance, Inductance, etc.)
  • Bonding Test
  • First Piece Article Inspection
  • Visual

Manufacturing Equipment and Process

Production Equipment

  • Automated and Semi-Automated Cut, Strip, Crimp, Solder, and Terminate
  • Schleuniger PowerStrip 9550
  • Schleuniger EcoStrip
  • Schleuniger Unistrip 2300
  • Schleuniger CoaxStrip 5400
  • Automatic Crimping Tool
  • Mark-10 Pull Tester

Testing Equipment

  • Cirris Testers – for low voltage and hi-pot testing up to 1500Vdc and 1000Vac.
  • Anritsu Network Analyzer – 1-port cable and antenna analyzer covering 20 MHz to 6 GHz range.

Production Volume and Capacities

  • High mix cable assembly, wire harness and box build manufacturing
  • 60,000+ units per quarter
  • Low, medium and high complexity (1000+ connections)
  • 15,000 sq ft high security (CGP) manufacturing area
  • 3500 sq ft injection molding / CNC area

Injection Molding and CNC Capabilities

All molding and CNC work is done in house by MRO CAD operators, CNC specialists and injection molding specialists.

Injection Molding Capabilities

CNC Tooling

  • Hurco CNC machine
  • Datron CNC machine
  • Manual mill and lathe
  • Haas CNC machine

Mold Machines

  • 8 x Morgans
  • 3 x Yuhdaks
  • 2 x MoldMan

Manufacturing Materials

Jacket Materials

  • Polyvinyl Chloride (PVC)
  • Polyurethane (PU)
  • Thermoplastic elastomer (TPE)
  • Polytetrafluoroethylene (Teflon)
  • Polyethylene
  • Cross Linked Polyolefin
  • Thermoset Rubber
  • Custom
    • Silicone
    • Aluminum

Cable Types

  • TPU
  • SOOW
  • SJOW
  • TPE
  • PVC
  • PTFE
  • TPR

Conductor Sizes

  • 34 awg – 8awg

Stranding Sizes

  • 0.002″ – 0.023″


  • Polyvinyl Chloride (PVC)
  • Polyurethane (PU)
  • Thermoplastic elastomer (TPE)
  • Polytetrafluoroethylene (Teflon)
  • Silicone


  • Nylon
  • Kevlar
  • PVC

Wraps / Shields

  • Aluminized Mylar

Supply Chain Information


  • Global Import / Export Capabilities
    • ECCN requirements experienced for US based clients.
    • Updated procedures to comply with CUSPA (Formerly NAFTA)
    • We import and export electronic components globally and can handle all regulatory requirements from commercial documentation to certificates of origin.
  • Long term relationships with major carriers (UPS, FedEx, etc)
  • Dedicated 3rd party logistics support for brokerage and customs issues.
  • Emergency global air freight services for mission critical orders.


  • 30 years in business—we have well established relationships with multiple vendors from around the world.
  • Redundant vendors for many manufacturing materials.
  • Single source vendors for projects where required.
  • Mix of US, Canadian and International vendors—more resilient to market changes.


  • 35,100 sq ft total
  • Calgary Headquarters – 18,500 sq ft
    • 15,000 sq ft High Security Production Area
    • 3500 sq ft Molding and CNC Shop
  • Calgary II – 8300 sq ft Offices and Warehouse
  • Edmonton – 4800 sq ft Showroom and Offices
  • Vancouver – 3500 sq ft Showroom and Offices