Operations, Maintenance and Repair
We go beyond reactive repairs delivering strategic maintenance that protects your investment, anticipates risk, and ensures long-term performance.
Continuity You Can Count On
Subsea systems don’t end at installation. MDM provides long-term support to protect your investment from monitoring and inspections to emergency repairs and cable protection upgrades.
Operations, Maintenance and Repair Support Services
Subsea infrastructure is a long-term asset, but only if it’s protected.
MDM helps you plan for performance, prevent costly failures, and respond rapidly when issues arise, so your system delivers over its full lifecycle.
We help you stay ahead of issues through structured monitoring, regular inspection campaigns, and risk assessment reviews.
We help facilitate:
- Subsea asset condition monitoring programs
- Periodic inspections using remotely operated vehicles (ROV) and sonar technology
- Review of cable movement, exposure, or freespans
- Geographic information systems (GIS) mapping and analysis
- Risk heatmaps and maintenance prioritisation
When faults occur, every hour matters. MDM coordinates and manages rapid mobilisation, diagnostics, and response, coordinating with vessel operators, authorities, and cable owners to minimise downtime.
We help facilitate:
- 24/7 response protocols and escalation planning
- Cable fault diagnostics and location detection using tools such as optical time-domain reflectometry (OTDR)
- Emergency repair mobilisation
- Cable retrieval, jointing, and reburial
- Stakeholder communications during outage events
We don’t just react, we plan. MDM develops long-term maintenance strategies that reduce costs, extend asset life, and support budget forecasting.
We help facilitate:
- Maintenance planning frameworks
- Cable health lifecycle models
- Support for operating expenditure (OPEX) forecasting and maintenance budgeting
- Asset life extension strategies
- Technical input to future route upgrades
Even during maintenance, obligations continue. We ensure environmental and jurisdictional compliance for ongoing work, repair campaigns, and asset access.
We help facilitate:
- Permit renewals and notifications for cable works
- Compliance with environmental and maritime regulations
- Liaison with port authorities and seabed managers
- Marine coordination during intervention campaigns
- Environmental reporting and restoration post-repair
As threats evolve. like fishing, anchors, climate, MDM helps you proactively adapt cable protection strategies to future-proof your infrastructure.
We help facilitate:
- Threat assessment and impact modelling
- Cable reburial and armouring
- Addition of mattressing, rock placement, or covers
- Rerouting options and new burial corridor design
- Updates to ALARP (as low as reasonably practicable) risk mitigation documentation
We help you meet internal, commercial, and regulatory expectations with clear, tailored reporting on maintenance performance and SLAs.
We help facilitate:
- Monthly or quarterly performance reports
- Reports for regulators, funding bodies, or internal teams
- Communication logs from intervention events
- Records of inspections, faults, and corrective actions
Testimonial
Built to Last: IRIS and the Power of Proactive Support
Discover how MDM supports the long-term performance and resilience of the IRIS system: a strategic cable connection between Iceland and Ireland.
From lifecycle planning to operational support, we help ensure this sovereign infrastructure delivers for decades to come.
Explore Our Full Service Offering
From planning to post-installation support, MDM is with you every step of the way
Strategic Planning & Assessment
Comprehensive project assessment and route analysis to ensure optimal subsea cable deployment. MDM provides feasibility studies, risk assessments, environmental impact evaluations, and regulatory compliance guidance to set the foundation for a successful installation.
Project Execution
Precision-driven cable laying operations using industry-leading technology and expertise. MDM manages marine surveys, vessel coordination, cable burial, and protection strategies to ensure a secure and efficient installation.
Landing Activities
Seamless integration of subsea cables with onshore infrastructure. MDM oversees shore-end landings, cable termination, and coordination with local authorities to guarantee a smooth transition from sea to land.