OT resilience has moved from a specialist security topic to a board-level business priority. Regulatory obligations have tightened. The financial consequences of OT downtime have grown. And the threat landscape facing critical national infrastructure operators in the UK has changed faster in the past 24 months than in the preceding decade.
Yet for many C-suite executives, operational technology security remains difficult to get a clear picture of. The technical language is unfamiliar. The frameworks are borrowed from IT security and do not always translate. And the path from current state to genuine OT cyber resilience is rarely laid out in terms that make sense at board level.
This guide is designed to change that.
What is OT resilience?
OT resilience is an organisation’s ability to maintain safe, continuous and recoverable operational technology processes in the face of cyber threats, system failures and disruptive events. It goes beyond prevention. A truly resilient OT programme assumes that incidents will occur and builds the detection, response and recovery capability to manage them without catastrophic operational consequences.
For critical infrastructure operators, including energy, utilities, manufacturing, transport and government, OT resilience is not simply a security objective. It is a business continuity imperative with direct financial, regulatory and safety implications.
The OT security landscape in 2026
The numbers frame the challenge clearly. Nation state attacks targeting OT environments increased by 129% year on year, according to the NCSC’s 2025 Annual Review. The average time to detect a compromise in an OT environment is 52 days, based on e2e-assure’s own research. The projected global financial risk from OT cyber incidents in 2026 stands at $31 billion, according to Dragos.
For the World Economic Forum, 64% of senior leaders now cite geopolitically motivated attacks as a primary concern, and 42% identify IT/OT/IoT convergence as a top risk driver. The attack surface is expanding precisely as the threat is intensifying.
A four-stage framework for OT cyber resilience
Across our OT Resilience Blueprint webinar series, featuring senior practitioners from BP, the Port Authority of New York and New Jersey and leading independent OT security specialists, a consistent framework emerged. Mature OT security programmes move through four stages. Each builds on the last.
- Stage 1: Reveal. Complete, current, continuously maintained visibility of every OT asset in the environment. This is the non-negotiable foundation. Without it, detection tools have no baseline, response teams have no map and regulators have no evidence of due diligence.
- Stage 2: Detect. OT-specific threat detection reaching into the process control layer, built around attacker behaviour rather than static indicators. IT security tooling applied to OT environments creates a false sense of security. Detection capability needs to be designed for the specific characteristics of OT, namely stable, low-volume, high-consequence environments.
- Stage 3: Protect. The ability to respond effectively when an incident occurs. This includes response planning, tabletop exercising at executive level, vulnerability management and the critical question of who has authority to make containment decisions before those decisions need to be made in real time.
- Stage 4: Connect. Integration of detection, response and recovery into a sustainable, connected programme that produces meaningful metrics for different audiences and addresses the disaster recovery dimension that even mature programmes frequently overlook.
The regulatory context every C-suite leader needs to understand
NIS2, the NCSC Cyber Assessment Framework 4.0 and the UK Cyber Resilience Bill have collectively raised the bar for CNI operators. The key shift for board-level leaders is this: OT security is no longer a matter that can be delegated entirely to the technology function. It is a governance obligation with direct legal and financial consequences.
Regulators are not prescribing specific technical solutions. They are holding organisations accountable for having a credible, documented and tested process for managing OT cyber risk. The difference between organisations that satisfy that obligation and those that fall short almost always comes down to whether the four-stage framework described above has been worked through systematically.
Five questions for the C-suite
The guide includes five questions designed to be taken directly into a board or security review meeting. They require no technical expertise to ask. But the quality of the answers your security leadership provides will tell you a great deal about where your OT resilience programme stands.
Read the full guide
The C-Suite Guide to OT Resilience is free to read and written specifically for board and executive level leaders at UK critical infrastructure organisations. It draws on insights from practitioners who have built and led OT security programmes at some of the world’s most complex critical infrastructure environments.
► Access the full guide now: C-Suite Guide to OT Resilience 2026
