OT Cybersecurity Assessment
Understand your OT security posture
An OT cybersecurity assessment provides a structured view of the security controls protecting an industrial environment, the gaps that require attention, and the improvement activities that may strengthen resilience.
- Sheet
- Service sheet
- Service
- OT Cybersecurity Assessment
- Scope areas
- 13
- Potential deliverables
- 8
- Engagement
- Scoped to you
In short
An OT cybersecurity assessment is a structured review of the people, process and technical controls that protect an industrial control system environment. It compares what is in place against an agreed reference, such as IEC 62443 or an internal standard, records the evidence behind each observation, and turns the gaps into prioritized, operationally realistic recommendations.
The challenge
Many industrial sites have grown over decades. Control systems from several vendors, remote connections added for support contracts and networks extended during projects all accumulate. Documentation rarely keeps pace, and security responsibilities are often split between engineering, IT and external integrators.
Leadership then asks a simple question — how secure are our operations? — that nobody can answer with confidence. An assessment gives a defensible answer: what is in place, what is missing, what evidence supports each conclusion, and where improvement effort should go first.
Scope and activities
The control areas below form a typical baseline. We agree the exact areas, sites and systems with you before work starts.
Assessment objectives and scope
Sites, systems, zones, reference framework and the questions the assessment must answer.
OT asset inventory and ownership
Whether assets are identified, classified and owned, and how current the records are.
Network architecture and segmentation
IT/OT separation, internal segmentation and the assumptions the design relies on.
Security zones and communication paths
How zones are defined and which flows cross their boundaries, and why.
Identity and access management
Accounts, shared and default credentials, privileges and joiner–leaver processes.
Remote and third-party access
Vendor and engineering access paths, approval, session control and logging.
Endpoint protection and hardening
Workstation and server baselines, removable media, application control and anti-malware.
Vulnerability and patch management
How advisories are tracked, applicability decided and patches or mitigations applied.
Backup and recovery
Coverage of configurations and system images, offline copies and restore testing.
Logging, monitoring and incident response
What is logged, who looks at it and how an OT incident would be handled.
Configuration and change management
Control of logic, firmware and configuration changes, including emergency changes.
Policies, procedures and governance
Whether OT-specific security requirements exist, are owned and are used in practice.
Evidence quality and limitations
How strongly each conclusion is supported, and what could not be verified.
Potential deliverables
Final deliverables depend on the agreed engagement.
- Assessment scope and methodologyWhat was assessed, against which reference, and how.
- Asset and architecture observationsNotable findings about inventory quality and network design.
- Control assessment resultsStatus of each assessed control with supporting rationale.
- Evidence registerDocuments, interviews and observations each conclusion relies on.
- Findings and risk registerGaps described, rated and linked to affected systems.
- Prioritized recommendationsActions grouped by urgency, effort and operational impact.
- Remediation roadmapA phased plan that respects maintenance windows and dependencies.
- Executive summary and technical reportOne view for management, one for engineering teams.
Engagement approach
Scope
Agree objectives, systems, reference framework, stakeholders and constraints such as site access rules.
Collect
Review documentation and exports, then hold structured interviews with engineering, IT and operations.
Verify
Where agreed, confirm key observations on site or through read-only configuration review.
Analyze
Rate control status, document findings with evidence and assess their operational significance.
Report
Present results, agree priorities with your team and finalize the roadmap.
Assumptions and limitations
- The final scope and deliverables depend on the agreed engagement.
- The assessment is non-intrusive by default. Active scanning or testing of live control systems is only performed if separately agreed and planned with operations.
- Conclusions reflect the information and access provided during the assessment period.
- An assessment identifies gaps and priorities. It does not certify compliance or guarantee that incidents cannot occur.
What helps us get started
- Network and architecture drawings, even if out of date
- Any existing asset lists or system exports
- Relevant policies, procedures and previous audit results
- Access to engineering, IT and operations contacts for interviews
Sensitive material is exchanged only after an engagement is agreed, using a method we agree with you — never through the website form.
Questions about OT Cybersecurity Assessment
What is an OT cybersecurity assessment?
It is a structured review of the security controls protecting an industrial environment. It identifies gaps against an agreed reference, records the evidence behind each conclusion and produces prioritized recommendations.
Will the assessment disrupt production?
It should not. The default approach relies on documents, interviews and read-only review. Any on-site verification or technical testing is planned with operations and only performed when agreed.
Which framework do you assess against?
Commonly IEC 62443, the NIST Cybersecurity Framework, NIST SP 800-82 guidance or your organization's internal standard. We agree the reference during scoping.
What should an OT assessment report contain?
At minimum: scope and method, control results, findings with evidence, a risk-informed priority for each finding, recommendations, a roadmap, and a clear statement of assumptions and limitations.
How long does an assessment take?
It depends on the number of sites, systems and stakeholders. A single site with a defined scope is typically measured in weeks rather than months. We provide an estimate after scoping.
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Talk to us about OT Cybersecurity Assessment
Share your objectives and constraints. We'll help you define a scope that fits your operations.