RFRavenForge OT
OT / ICS / Industrial cybersecurity

Clear 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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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Download the service catalogue (PDF)

Our delivery method

Evidence that supports operational decisions

01

Agree the boundary

Define the business process, systems, operational constraints and questions the work must answer.

02

Examine evidence

Review architecture, interviews and agreed control evidence. Keep missing information visible.

03

Review consequences

Consider credible industrial scenarios and dependencies with the accountable operational owners.

04

Prioritise improvement

Turn findings into actions with ownership, dependencies and realistic implementation sequencing.

05

Reassess 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 partnerships

OT 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
Independent digital products

Tools for your own assessment work

Original assessment prompts, editable records and worked guidance for competent practitioners. Proposed launch prices below; checkout and final licence terms are being configured. Purchase enquiries are welcome.

Remote Access Starter

£49 / purchased version

Eight access-control questions, a supplier record and an owned action list.

Offline assessment tool, quick-start guide, example and internal-use licence. One organisation's internal use; professional client-use rights separately agreed.

Request purchase details

OT Risk & Roadmap Pack

£79 / purchased version

An editable scenario register and prioritised action roadmap with explicit unknowns.

Offline risk/action tool, rating guidance, worked scenario and reporting template. One organisation's internal use; professional client-use rights separately agreed.

Request purchase details

OT Tabletop Starter

£99 / purchased version

A fictional vendor-compromise exercise for an internal facilitator.

Facilitator guide, scenario/inject cards, participant brief, observation log and after-action template. One organisation's internal use; professional client-use rights separately agreed.

Request purchase details

Vendor & Remote Access Toolkit

£199 / purchased version

Starter assessment plus supplier evidence requests, approval/exception records and reporting materials.

Offline assessment, supplier questionnaire, evidence request, exception and report templates. One organisation's internal use; professional client-use rights separately agreed.

Request purchase details

Core OT Assessment Toolkit

£395 / purchased version

28 control prompts, eight scenarios, evidence references and remediation/reporting workflows.

Assurance Studio offline edition, method guide, scope/evidence templates and reporting example. One organisation's internal use; professional client-use rights separately agreed.

Request purchase details

Download the free remote-access checklist

A focused first conversation

What decision do you need to make?

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