Industry
Offshore & Process Industries
Assurance for vendor package systems, remote support links, strict change control, safety interfaces, and constrained maintenance windows.
Sector context
Offshore and process environments depend on safe, reliable and controlled operation. Cybersecurity decisions must consider production availability, process safety, environmental risk, maintenance access and the realities of operating in remote or hazardous environments.
This includes offshore platforms, FPSOs, terminals, chemical plants, petrochemical facilities, compression systems, process packages and safety-related control environments.
Common OT cybersecurity problems in offshore and process industries
Typical issues include
- Legacy BPCS, SIS, F&G, ESD and package control systems
- Vendor-maintained systems with unclear access routes
- Limited bandwidth or restricted offshore connectivity
- Mixed responsibility between operator, EPC, integrators and vendors
- Cybersecurity requirements introduced late in project delivery
- Weak separation between control, safety and support networks
- Limited evidence for audits, assurance reviews, FAT, SAT and handover
Relevant services
- Vendor package review
- FAT/SAT cybersecurity verification
- Network architecture review
- Cybersecurity risk assessment
- IEC 62443 support
- Engineering assurance
Stakeholders involved
Decisions and constraints
- Operations need stable plant control
- Safety teams need confidence that cybersecurity controls will not undermine safety functions
- Engineering teams need technically defensible designs
- Maintenance teams need controlled but workable access
- Project managers need clear deliverables
- Vendors need defined requirements
- Assurance teams need evidence that risks have been considered and reduced proportionately
Relevant engineering work
Activities
- OT cybersecurity readiness reviews
- IEC 62443-aligned SuC definition, zones and conduits
- BPCS, SIS, F&G, ESD and package interface reviews
- Remote access and vendor support assessments
- Network architecture and segregation reviews
- Cybersecurity requirements for vendor packages
- FAT, SAT and commissioning evidence support
- Cybersecurity risk assessment support
- Audit response and evidence gap reviews
Cybersecurity and process safety interface
HSE guidance on industrial automation and control system cybersecurity, including OG86, is relevant where cyber compromise could affect major-hazard risks under COMAH. A review can examine how BPCS, SIS, fire-and-gas and ESD interfaces, remote access and supplier packages affect the cyber risk and assurance picture.
IEC 62443-aligned system risk assessment and security requirements can support this engineering work, alongside applicable process and functional-safety obligations. Cybersecurity review does not replace IEC 61511 or IEC 61508 work, functional-safety verification or decisions made by the responsible safety specialists.
Practical outcome
Decisions the review should support
- Which systems are in scope
- Where safety and control interfaces need stronger segregation
- How vendors access the OT environment
- What evidence is missing for assurance
- Which controls are realistic for the asset
- What should be addressed now and what should be planned into future outages or upgrades
Worked example
- Context
- An offshore process facility is integrating several package control systems into a wider platform control network. Supplier access and package interfaces need review before acceptance.
- Review focus
- Meridian can review the interfaces and access assumptions, then define the cybersecurity evidence needed for FAT, SAT and project close-out.
Worked technical example only; it does not describe a completed Meridian client engagement.
Standards and guidance references
The following external references provide useful context for organisations considering OT cybersecurity, assurance, NIS alignment or IEC 62443-based control system security work.
Related OT cybersecurity topics
Related services
Choose this when your project needs specialist engineering capacity. A defined OT cybersecurity work package for risk, architecture, design review, supplier interfaces and assurance evidence within an active industrial project.
Start here if you are unsure what applies or where to begin. Establish the boundary, applicable lifecycle context, available evidence and next engineering work before a detailed IEC 62443 assessment or project decision.
Discuss offshore & process industries OT cybersecurity
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