2T SECURITY
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Critical National Infrastructure

CYBER SECURITY SERVICES for a rapidly transforming sector

THE CHALLENGE

The Critical National Infrastructure sector is undergoing significant transformation, driven by the global push towards sustainability, technological advancements, and the urgent need to modernise ageing infrastructure.

The industry faces complex challenges, including regulatory pressures to reduce carbon emissions, integrating renewable energy sources, and the demand for more resilient and efficient systems. Additionally, the rise of digital technologies, geopolitical instability, and the increasing threat of cyber attacks necessitate robust cyber security measures to enhance operational efficiency and protect critical infrastructure. CNI providers must adapt their operational models and invest in innovative solutions to navigate these challenges while meeting the evolving expectations of consumers and stakeholders in a rapidly changing landscape.

WHEN OPERATIONAL TECHNOLOGY MEETS INFORMATION TECHNOLOGY IN CNI

Keeping a refinery online or balancing load across a national grid now depends as much on Ethernet and IP as on pressure valves and turbines.

That collision of Operational Technology (OT) and Information Technology (IT) unlocks efficiency but also introduces risks that are uniquely hard to manage in Critical National Infrastructure.

OT Centric Challenges

Legacy & Proprietary Protocols

decades‑old PLCs, serial links and vendor‑locked HMIs that were never designed for the Internet.

24 × 7 Uptime Mandate

outages aren’t an inconvenience; they threaten national wellbeing.

Safety & Regulatory Pressure

COMAH, ONR SAPs, IEC 61511 demand demonstrable proof that safety cannot be compromised.

Air Gaps That aren’t

Remote maintenance links, IIoT sensors and cloud‑based historians quietly re‑wire “segregated” networks.

IT Centric Challenges

Pace of Change

cloud adoption, DevOps pipelines and weekly patch cadences.

Ever Evolving Threat Landscape

ransomware, supply‑chain compromise and state‑level actors.

Data Centric Compliance

GDPR, ISO 27001, NIS2 impose continuous evidence of confidentiality and integrity.

Hybrid Workforce

contract staff and vendors require access from anywhere, on any device.

Where They Collide

Attempting to patch a safety critical DCS at “cloud speed” can halt production—or worse, jeopardise safety.

A single mis configured gateway can let adversaries traverse from laptop to breaker panel in minutes.

Dual regulated environments must prove both people safety and data safety—all with the same budget.

Externally exposed remote access portals are now the #1 initial access vector in CNI incidents.

How We
Close the Gap

NCSC Assured Risk Services

We are one of the few providers accredited under the NCSC Assured Cyber Security Consultancy scheme for risk management.

 

  • CAF & NIS2 Readiness—risk workshops mapped directly to the NCSC Cyber Assessment Framework and evolving EU directives.
  • Safety‑Integrated Risk Models—merged Bow‑Tie & DREAD analyses ensure cyber mitigations never undermine process safety.

Security Architecture for OT/IT Convergence

Our NCSC-Assured Security Architects designed a government-accredited Cross‑Domain Gateway (CDG) and the Advanced Mobile Solutions (AMS) reference stack. They are experts in designing compliant systems for critical industries.

 

  • Zone & Conduit Design—robust segmentation and deterministic data‑diodes between Corporate IT, DMZ, Process Control and Safety Instrumented Systems.
  • Zero‑Trust for Field Assets—identity-bound, context-aware access down to the PLC, engineered for low-bandwidth environments.
  • Compliance by Design—architecture artefacts aligned with compliance frameworks that matter, from day one.

Advanced SOC for CNI

Traditional SOCs drown in OT noise; ours was built for it.

 

  • 24 × 7 OT‑Aware Monitoring—deep‑packet inspection of Modbus, DNP3, OPC UA and GOOSE alongside IT telemetry.
  • Technology-Driven Anomaly Detection—baselines deterministic OT traffic to spot micro‑deviations long before human operators notice.

Continuous Improvement Loop

Threat actors don’t stand still, and neither do we.

 

  • Threat‑Intelligence Sprintsfeed directly into detection rules and architecture hardening.
  • Patch & Deploy Playbookstested in shadow environments let you update safety-critical assets without unplanned shutdowns.
  • Metrics That Matter—mean‑time‑to‑detect, safety‑impact likelihood, and regulatory non-conformance trend lines reported to board level.

Why choose
2T Security

Government Assured Expertise

Risk Analysts and Security Architects of accredited Cross‑Domain Gateway (CDG) architectures.

Threat Informed

Our team includes risk, architecture and monitoring experts

Built for CNI

Proven in the most demanding critical‑infrastructure environments, including nuclear and chemical.

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READY TO SECURE WHAT MATTERS MOST?

Whether you’re blending volatile chemicals, spinning megawatt turbines or safeguarding nuclear isotopes, we turn the OT/IT convergence challenge into a strategic advantage—backed by NCSC assurance, robust risk assessments, battle tested security architecture, and an Advanced Security Operations Centre built around your threats.

Cyber Risk Reviews (CRR)
Cyber Assessment Framework (CAF)
Security Architecture Design & Review
Advanced Security Operations Centre (SOC)

Get the expert help you need

speak to our team today

2T SECURITY excels at supporting organisations undergoing digital transformation by providing leadership and delivery expertise when it matters most.

Change creates opportunity but also risk in every organisation. We bring a calm head and the safest pair of hands to help our clients achieve their security goals.