OT / ICS / Industrial cybersecurityClear decisions for
critical operations.
Understand your OT security position, challenge important designs and turn findings into an owned improvement plan.
Specialist assessments, architecture reviews and continuing assurance for industrial organisations. Available directly or through consultancy and engineering partners.
Defined scope. Useful deliverables.OT assurance services
Indicative fees in GBP, plus VAT where applicable. Scope, site count, travel and delivery dates are agreed before engagement.
OT Security Baseline
£9,500 / engagement
No agreed view of the industrial security position or the actions that matter most.
You receive: Scope record; evidence register; findings and risk register; prioritised 12-month roadmap; executive report and readout.
Inputs, delivery and scope
One site or agreed remote boundary; current diagrams; available asset information; relevant policies; up to six stakeholder interviews; evidence supplied by the customer.
Confirm operational scope and constraints; review architecture and sampled evidence; assess applicable controls; examine operational risk scenarios; validate findings with owners; prioritise a 12-month roadmap; brief management.
Remote-led, one agreed environment, up to six interviews, one management readout and one consolidated factual-correction round.
Excluded: Intrusive scanning, penetration testing, exhaustive asset discovery, certification, implementation and a guarantee of risk reduction.
Discuss this service →OT Architecture Review
£3,500 / engagement
A design or supplier proposal needs independent security challenge before implementation.
You receive: Annotated review findings; security requirements; decision log; prioritised design actions; design-review meeting.
Inputs, delivery and scope
One architecture or change proposal; diagrams; data flows; security requirements; operational constraints; supplier design information.
Review trust boundaries, zoning, remote access, identity and resilience; examine failure scenarios; discuss design decisions; record requirements and unresolved issues.
One bounded design, two review meetings and one factual-correction round. Range £2,500–£5,000; £3,500 is the standard scoping assumption.
Excluded: Detailed implementation, formal safety engineering, full site assessment and supplier product certification.
Discuss this service →Vendor & Remote Access Review
£2,500 / engagement
Supplier support access exists without clear ownership, boundaries or evidence.
You receive: Access register; supplier findings; control/evidence gaps; access requirements; prioritised actions and exception recommendations.
Inputs, delivery and scope
Up to three supplier arrangements at one site; access diagrams; account/control descriptions; approvals and redacted logs.
Document each access path; assess authentication, privilege, endpoint assurance, monitoring and expiry; review emergency and subcontractor access; validate exceptions.
Up to three documented supplier arrangements and one remote workshop.
Excluded: VPN/PAM implementation, direct account testing, vendor audits and continuous monitoring.
Discuss this service →IT/OT Segmentation Review
£3,500 / engagement
Trust boundaries and permitted flows are unclear, increasing potential incident spread.
You receive: Boundary findings; required flow decisions; segmentation improvement plan; architecture readout.
Inputs, delivery and scope
One site/boundary design; network and zone diagrams; flow requirements; sampled rule descriptions; maintenance constraints.
Review zones, conduits, boundary controls, management paths and dependencies; examine feasible improvement options with operations.
One agreed site/boundary with supplied documentation; detailed rulebase volume agreed before contract.
Excluded: Live firewall changes, full packet capture, active network discovery and implementation validation.
Discuss this service →Continuous OT Assurance
£2,500 / month
Assessment actions, exceptions and evidence become stale after the initial report.
You receive: Updated action/risk register; evidence-review notes; decision log; quarterly executive summary.
Inputs, delivery and scope
Agreed baseline; action register; changed designs/suppliers; updated evidence and customer progress reports.
Monthly risk/action review; sample closure evidence; review agreed changes and exceptions; escalate blockers; quarterly management summary.
Two practitioner days per month planned in advance; monthly meeting; quarterly report. Initial three-month term proposed.
Excluded: 24/7 monitoring, incident response SLA, unlimited architecture review and execution of customer remediation.
Discuss this service →Security Leadership & OT Advisory
£5,000 / month
The organisation needs senior security direction and decision support without a permanent senior hire.
You receive: 90-day leadership plan; decision and risk logs; programme recommendations; monthly steering briefing.
Inputs, delivery and scope
Business objectives; governance; risk position; programme plan; decisions needing specialist advice.
Agree 90-day priorities; chair agreed governance discussions; review architecture and investment decisions; support stakeholder and supplier challenge.
Four practitioner days/month, including the Continuous Assurance allowance where appropriate. Initial three-month term proposed.
Excluded: Statutory director/CISO accountability, 24/7 availability, unlimited delivery and responsibility for customer risk acceptance.
Discuss this service →OT Incident Tabletop
£2,500 / exercise
Teams have not rehearsed industrial cyber decisions, recovery dependencies or supplier escalation.
You receive: Exercise brief; facilitator plan; decision/observation log; after-action report; improvement actions.
Inputs, delivery and scope
One scenario; participant roles; existing response/recovery plans; constraints and exercise objectives.
Prepare fictional scenario and injects; facilitate a half-day decision exercise; capture observations; debrief and assign lessons.
One tailored scenario, up to 12 participants, one half-day facilitated session and debrief.
Excluded: Live production changes, red teaming, technical incident handling and a pass/fail certification.
Discuss this service →OT Awareness & Leadership Workshop
£2,000 / workshop
Business and technical stakeholders lack a common view of OT risk and responsibilities.
You receive: Workshop materials; discussion outcomes; responsibilities and next-step summary.
Inputs, delivery and scope
Audience, business context, learning objectives and approved discussion examples.
Tailor content; deliver a half-day workshop; discuss responsibilities and realistic decisions; capture agreed next steps.
One half-day workshop for up to 15 participants, with one preparation meeting.
Excluded: Accredited qualifications, multi-day technical training and customer-specific assurance findings.
Discuss this service →Multi-Site OT Programme Review
From £14,500 / starting project
Several sites use inconsistent assessment and investment priorities.
You receive: Site comparison; critical-exception summary; group roadmap; programme governance recommendations; executive briefing.
Inputs, delivery and scope
Up to three existing site assessments using a comparable scope; group governance; site priorities and action registers.
Check comparability and gaps; normalise findings; identify group dependencies and critical exceptions; prioritise programme governance and investment.
From £14,500 for review of up to three existing site assessments. New assessments or visits are separately scoped.
Excluded: Three complete new site baselines at the starting price; implementation and unsupported portfolio risk averages.
Discuss this service →Download the service catalogue (PDF)
Our delivery methodEvidence that supports operational decisions
01Agree the boundary
Define the business process, systems, operational constraints and questions the work must answer.
02Examine evidence
Review architecture, interviews and agreed control evidence. Keep missing information visible.
03Review consequences
Consider credible industrial scenarios and dependencies with the accountable operational owners.
04Prioritise improvement
Turn findings into actions with ownership, dependencies and realistic implementation sequencing.
05Reassess progress
Review closure evidence and continuing risk. Completion percentages alone do not establish effectiveness.
Read the approach and framework (PDF)
Assessment criteria can reference IEC 62443 and NIST guidance within an agreed scope. Services do not constitute certification.
Specialist delivery partnershipsOT expertise within your client engagement
Add capacity for a defined assessment, design review or recurring advisory requirement.
Referral or joint delivery
Introduce a relevant requirement, or combine your engineering and customer knowledge with RavenForge assessment and architecture support. Commercial responsibilities are agreed per opportunity.
Resale or specialist subcontracting
Keep your customer relationship while commissioning a defined delivery scope. Branding, IP, liability, confidentiality and account ownership are agreed before delivery.
Discuss a partnership