Power and Utilities

Keep the lights on, the water flowing and the regulator satisfied — through a cyber attack, a system failure and any other unexpected disruption.

The energy and water sectors are being rebuilt in real time. Decarbonisation, distributed generation, smart metering and remote operations have connected control systems that were never designed to be connected — and made cyber risk an operational risk, not an IT one. MHNK Associates helps generators, network operators, renewables developers and water companies secure their operational technology, prove they can recover it, and demonstrate resilience to the boards and regulators who now ask for evidence, not assurances.

The pressures reshaping Power and Utilities

Few sectors carry the same combination of pressures. You are asked to decarbonise and digitise at pace, hold down customer bills, and simultaneously prove that critical national infrastructure can withstand a determined, well-resourced adversary. Those objectives pull against each other, and OT sits in the middle of the tension.

A converged, expanding attack surface. IT/OT convergence, cloud-hosted historians, remote engineering access and third-party maintenance connections have dissolved the air gap most control-system architectures were designed around. Every new smart substation, aggregated flexibility asset and remotely monitored pumping station adds an entry point.

Legacy plant that cannot simply be patched. Protection relays, RTUs, PLCs and DCS platforms with twenty- and thirty-year service lives run unsupported operating systems and proprietary protocols. Taking them offline for a security update means taking an outage — so risk accumulates while compensating controls do the work.

Distributed, unmanned and hard to see. Substations, wind farms, solar sites, battery storage, reservoirs and pumping stations are thinly staffed and geographically spread. Asset inventories are frequently incomplete — many operators still track OT assets on spreadsheets — and you cannot protect, patch or recover what you cannot see.

A supply chain you do not directly control. OEM remote support, integrators, managed service providers and specialist contractors hold privileged access to your control estate. Recent regulation reflects this: critical suppliers and managed service providers are being pulled directly into scope.

Threats aimed at physical consequence. Industrial adversaries are no longer only stealing data. Threat groups have been observed systematically mapping control loops — HMIs, variable frequency drives, metering modules and cellular gateways — across electricity and water infrastructure, pre-positioning for disruption rather than extortion. Meanwhile ransomware against industrial organisations rose sharply again in 2025, and the operational consequence is usually the same: production or supply stops while the enterprise recovers.

Resilience failures that are not cyber at all. The March 2025 North Hyde substation fire, which closed Heathrow airport and cut supply to tens of thousands of customers, was a reminder that a single asset, a missed maintenance signal and an untested dependency can be just as disruptive as an attacker. Genuine operational resilience is threat-agnostic.

Our services for Power and Utilities

OT Cybersecurity

Securing control systems is an engineering discipline before it is a security one. We work inside the operational constraints — safety cases, outage windows, vendor warranties, protection settings — rather than importing IT controls that plant managers will rightly refuse.

OT asset discovery and network visibility — passive discovery and traffic analysis across Purdue levels 0–3 to build the authoritative inventory of devices, firmware, protocols and communication flows that every other control depends on.
Architecture review and defensible segmentation — zone and conduit design to IEC 62443-3-2, DMZ and data-diode design, secure remote access for OEMs and engineers, and elimination of flat, unmonitored control networks.
OT risk assessment and consequence analysis — assessing risk in terms of operational and safety consequence — loss of view, loss of control, loss of supply — not CVE counts, so investment lands where the physical impact is greatest.
OT security monitoring and threat detection — protocol-aware monitoring, detection use cases mapped to attacker behaviour, and integration into a SOC that understands the difference between an engineering change and an intrusion.
Vulnerability and patch management for plant — risk-based prioritisation, compensating controls where patching is impossible, and change processes that survive contact with an outage plan.
Supply chain and third-party assurance — supplier security requirements, secure-by-design procurement clauses, factory and site acceptance security testing, and assurance over managed service provider access.

OT Disaster Recovery

Most utilities have a tested IT disaster recovery plan and an untested assumption about OT. The critical question is not whether backups exist, but whether you can rebuild a DCS, reload a PLC programme, restore historian continuity and safely return plant to service — under pressure, with the vendor unavailable and the network isolated.

OT backup and recovery design — validated, offline and immutable backups of controller logic, HMI applications, engineering workstations, firmware, protection settings and configuration baselines, with defined ownership and verification.
Recovery objectives grounded in operations — RTO and RPO derived from an OT-specific business impact analysis: supply continuity, safety systems, regulatory reporting obligations and market settlement, not server tiers.
Golden images and rebuild capability — documented, tested rebuild procedures for critical control assets so recovery does not depend on the memory of one engineer or a decommissioned laptop.
OT incident response planning — ICS-specific playbooks covering isolation decisions, manual and degraded operating modes, safe shutdown and restart, evidence preservation, and the interface between control room, engineering, IT and executive decision-makers.
Exercising and validation — tabletop and live-recovery exercises with operations, engineering and executive teams, including cyber-induced scenarios where the network cannot be trusted and restoration from backup is the only route back.
Manual fallback and degraded operations — the procedures, competencies and instrumentation needed to keep running safely when automation is unavailable.

Operational Resilience

Resilience is the outcome; cybersecurity and disaster recovery are two of the means. We help utilities define what must not fail, understand the dependencies that could make it fail, and evidence the whole picture to boards and regulators.

Critical service mapping and dependency analysis — identifying the important business services (supply, water quality, market participation, customer safety) and tracing the people, plant, data, telecoms and suppliers each one depends on.
Impact tolerances and scenario testing — setting the maximum tolerable disruption for each critical service and severe-but-plausible scenario testing against it, including cyber, plant failure, telecoms loss, extreme weather and supplier collapse.
Business continuity and crisis management — ISO 22301-aligned continuity management integrated with existing emergency and incident arrangements rather than bolted alongside them.
Resilience assurance and board reporting — clear, evidenced reporting of resilience posture, control effectiveness, residual risk and improvement trajectory, in language boards and regulators can act on.
Data integrity and single source of truth — assurance over the operational, asset and metering data that outage management, condition monitoring, settlement and regulatory reporting all depend on.
Resilience by design in change programmes — embedding security and recoverability requirements into grid modernisation, renewables connection, smart metering and control-system replacement programmes, where they cost a fraction of what retrofit does.

Why MHNK Associates

Operational technology is our professional foundation. We come from asset-intensive industrial operations — oil and gas, manufacturing, automotive, power and utilities — so we understand operational challenges, safety cases and outage windows on a live plant.
We don't just assess — we design and implement. Our engagements end in working controls, tested recovery capability and trained people, not a report that names the problems you already knew about.
Cyber, recovery and resilience as one programme. Securing an environment you cannot recover is half a job. We join OT cybersecurity, disaster recovery and operational resilience into a single, coherent roadmap.
Regulator-ready evidence. We build the artefacts — asset inventories, CAF outcome evidence, tested plans, impact tolerances, board reporting — that stand up to inspection and audit.
Vendor-independent and pragmatic. We recommend what fits your estate, budget and risk appetite. No product agenda, no boilerplate, no controls your operations team will quietly work around.

Can you prove your operations would recover?

If a control system were compromised tomorrow — or simply failed — how quickly could you restore safe operation, and what evidence would you give your regulator and your board?

If the answer is uncertain, that is the conversation worth having.

Book a free, no-obligation consultation to discuss your OT security posture, recovery capability and resilience obligations. We'll give you an honest view of where the gaps are and what it would take to close them.

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Enterprise Data Management and harnessing the power of data in the Power and Utilities sector

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