Industry
Gas & Energy Infrastructure
OT cybersecurity support for gas transmission, energy infrastructure, compressor control, telemetry, vendor access, safety interfaces and assurance requirements.
Sector context
Gas and energy infrastructure depends on reliable control systems, resilient communications and clear operational ownership. Compressor stations, AGIs, terminals, telemetry systems, substations, metering packages and remote assets often rely on long-life control equipment that was not originally designed for current cybersecurity expectations.
The challenge is rarely just cybersecurity. It is keeping essential services running while improving visibility, reducing exposure and producing evidence that satisfies engineering, operations, compliance and assurance stakeholders.
Examples on this page are fictionalised, generalised or anonymised to show typical problem types without identifying real clients, real sites, real drawings, real systems or confidential project details.
Common OT cybersecurity problems in gas and energy infrastructure
- Flat OT networks with limited segmentation
- Legacy PLC, SCADA, HMI, telemetry and engineering workstation arrangements
- Vendor remote access routes that are not fully documented
- Mixed ownership between operations, IT, engineering and suppliers
- Limited asset visibility across remote or unmanned sites
- Incomplete evidence for cybersecurity assurance reviews
- Difficulty aligning practical site constraints with IEC 62443 or NCSC CAF expectations
- OT cybersecurity assessment
- Network segmentation engineering
- IEC 62443 support
- Cybersecurity risk assessment
- Engineering assurance
- Documentation and design support
The common struggle
Many gas and energy sites have grown over time. New systems are added, vendors connect equipment, telemetry links are extended and temporary arrangements become permanent.
Over several years, the result can be a control system environment that works operationally but is difficult to explain, evidence or defend. Pressure is usually highest when a project, audit, client review or regulatory requirement exposes gaps that have existed for years.
Stakeholders involved
Gas and energy cybersecurity decisions affect more than the IT or cyber team. Meridian helps bring these groups into one practical engineering view.
- Operations need the site to remain available
- Engineering needs changes to be technically sound and manageable through change control
- Project teams need clear deliverables and realistic assumptions
- Compliance and assurance teams need evidence
- Safety stakeholders need assurance that cyber controls do not create operational or process risk
- Vendors need clear access requirements
- Senior managers need a proportionate plan that reduces risk without unnecessary disruption
How Meridian can help
Meridian Consultants supports OT cybersecurity improvement in gas and energy environments by helping teams understand what they have, where the real exposure is and what needs to change first.
The aim is not to produce generic cybersecurity paperwork. The aim is to produce engineering-led evidence that helps operations, projects and assurance teams make defensible decisions.
- OT cybersecurity readiness reviews
- IEC 62443-aligned system scoping
- SuC definition, zones, conduits and trust boundary development
- Network architecture review
- Remote access review
- Asset visibility and evidence gap assessments
- Cybersecurity input to FEED, detailed design, FAT, SAT and handover
- Practical risk reduction plans suitable for live operational environments
Practical outcome
A useful OT cybersecurity review should leave engineering, operations and assurance teams with a clearer basis for action.
- What systems are in scope
- Where the main cyber exposure exists
- Which interfaces need stronger control
- Which controls are realistic for the site
- What evidence is missing
- Which actions should be prioritised
Illustrative scenario
A UK energy infrastructure operator required a review of OT network arrangements at a remote operational facility. The environment included PLC-based control, SCADA workstations, telemetry links, vendor access routes and legacy communications.
The objective was to understand the existing architecture, identify practical segmentation options, clarify support routes and produce evidence suitable for design review and assurance close-out.
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
Continue through related service, problem and resource pages for the same OT cybersecurity topic.
Discuss gas & energy infrastructure OT cybersecurity
Book a technical discovery call to discuss the control system, project stage, documentation gap or assurance requirement without exposing sensitive site or client details.