OT Security Audits & Compliance

Defensible Evidence, Not Certificates of Convenience

99.9%

Threat detection and prevention rate

EuroShield conducts independent operational technology audits for industrial operators, portfolio companies, and boards that need a view an external reviewer — regulator, insurer, acquirer, or LP — will accept as credible.

Our audits are structured against IEC 62443-2-1 (security program), 62443-3-3 (system security requirements), ISO 27001 / 27019, NIS2 Article 21 technical measures, and sector overlays (KRITIS, LPM-OIV, UAE NCA OTCS, Saudi NCA OTCC, FINMA cyber guidance, CERT-In industrial, FDA and UNECE R155 where devices are in scope). Where the EU Cyber Resilience Act applies to manufactured components inside the audit boundary, forward obligations are scoped into the same engagement rather than left as an orphaned workstream.

We are deliberately not a certification body. We do not issue IEC 62443 or ISO 27001 certificates. We prepare clients to receive them — and, equally important, we write findings a board can act on without waiting for the certifier’s calendar.

Standards & Frameworks Audited

IEC 62443-2-1 (CSMS — cybersecurity management system)
IEC 62443-3-3 (system security requirements, per Security Level)
IEC 62443-4-1 / 4-2 (product security lifecycle, for OEMs and embedded components)
ISO 27001 / ISO 27019 (energy-sector extension)
NIS2 Article 21 technical and organisational measures
EU Cyber Resilience Act (CRA) conformity readiness for in-scope products
EN 50600 (data center OT and facility systems)
NIST CSF 2.0 and NIST SP 800-82 (industrial control systems)
FINMA cyber circular, BaFin BAIT/VAIT, ANSSI LPM, UAE NCA OTCS, Saudi NCA OTCC, CERT-In
Sector overlays: IEC 61511 (process safety-cyber interface), API 1164 (pipeline), NERC CIP where applicable

Audit Execution

Scoping workshop and evidence-request list, sized to the standard and the site
Document review: policies, procedures, network diagrams, asset inventories, change records, incident logs
Site walk-downs and control observation — not a tabletop-only exercise
Technical verification against control claims (configuration review, log sampling, conduit validation)
Data diode and unidirectional gateway specification where one-way flow is mandated (regulated, safety-critical)
Interview programme across engineering, OT operations, IT security, safety, and vendor-management functions
Evidence-linked scoring: every control rating supported by document ID, observation note, or technical artefact

Specialised Audit Tracks

Third-party and supply-chain audit — vendor cyber posture, SBOM review, and contractual cyber clauses
SOC / monitoring audit — detection coverage against MITRE ATT&CK for ICS, not just alert volume
Backup, recovery, and cyber-resilience audit — tested RTO/RPO for OT, offline immutability, ransomware scenarios
Pre-M&A audit — accelerated, SPA-grade, coordinated with DealShield™ engagement
Post-incident audit — root-cause, control-failure, and regulator-notification-ready

Secure Remote & Third-Party Access

OT-Specific Differentiation

Third-party and supply-chain audit — vendor cyber posture, SBOM review, and contractual cyber clauses
SOC / monitoring audit — detection coverage against MITRE ATT&CK for ICS, not just alert volume
Backup, recovery, and cyber-resilience audit — tested RTO/RPO for OT, offline immutability, ransomware scenarios
Pre-M&A audit — accelerated, SPA-grade, coordinated with DealShield™ engagement
Post-incident audit — root-cause, control-failure, and regulator-notification-ready

Deliverables

Audit Report — findings, evidence references, severity and likelihood, standard-clause traceability
Executive Summary — board-grade, one-pager per risk theme
Closure Plan — remediation backlog, owner-assigned, capex/opex separated, scheduled against planned shutdowns
Regulator-Facing Evidence Pack — organised to the clause structure of the target standard, not to our template
Follow-up Attestation — fixed-scope re-audit at six or twelve months to confirm closure