AS Secure Ops · Industrial Cybersecurity

OT Security & NIS2 Compliance done end-to-end

A single programme that takes you from security assessment to audit-ready operations — built and delivered in-house by the AS Engineering Team.
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The Challenge

Your production systems
were not built for today's threats.

OT environments are exposed

PLCs, SCADA systems, HMIs, and industrial networks were designed for reliability and uptime — not cybersecurity. As IT/OT convergence accelerates and remote access expands, these systems are increasingly reachable by attackers capable of halting production, damaging equipment, or compromising safety systems.

01
02

Compliance is now mandatory

The EU NIS2 Directive — transposed into Greek law as N. 5160/2024 — places binding cybersecurity obligations on operators of essential and important entities across manufacturing, energy, food & beverage, water, and more. Non-compliance carries significant administrative penalties and personal liability for senior management.

The Challenge

Your production systems
were not built for today's threats.

OT environments are exposed

PLCs, SCADA systems, HMIs, and industrial networks were designed for reliability and uptime — not cybersecurity. As IT/OT convergence accelerates and remote access expands, these systems are increasingly reachable by attackers capable of halting production, damaging equipment, or compromising safety systems.

1
2

Compliance is now mandatory

The EU NIS2 Directive — transposed into Greek law as N. 5160/2024 — places binding cybersecurity obligations on operators of essential and important entities across manufacturing, energy, food & beverage, water, and more. Non-compliance carries significant administrative penalties and personal liability for senior management.

Under N. 5160/2024, covered organisations must implement risk management measures, ensure business continuity, secure their supply chain, and maintain documented evidence of all controls. Management bodies are personally accountable for compliance — and must demonstrate it to supervisory authorities on request.

One programme.
Assessment to audit-ready.

AS Secure Ops covers the full lifecycle — we do not stop at the report. Consulting, implementation, and governance are delivered by the same in-house team.

Consulting-led

Risk-based architecture, zone & conduit design, prioritized roadmap, and a realistic change plan built around your production schedule.

Implementation-ready

We deploy segmentation, secure remote access, OT monitoring, hardening, and resilience controls — integrating leading vendors such as Fortinet, configured and validated in production by our OT engineers.

Audit & Governance

Policies, procedures, a complete evidence pack, and full readiness for external audit (e.g. TÜV) against IEC 62443 and NIS2.

5 phases.From baseline to audit-ready.

Each phase has defined outputs your engineering and management teams can use immediately. You can start with Phase 1 only — no commitment to the full programme required.

Phase 1 — Rapid OT Security Review

  • OT asset inventory: systems, PLCs, HMIs, servers
  • Network segmentation & IT/OT boundary analysis
  • Identity & access path review (operators, vendors, admins)
  • Backup, patching approach & incident readiness
  • High-level IEC 62443 and NIS2 gap snapshot

Deliverables

  • "As-is" OT security posture & risk register
  • Segmentation findings + quick remediation actions
  • High-level IEC 62443 / NIS2 gap snapshot
  • Executive debrief with prioritized next steps

Phase 2 — Full IEC 62443 Compliance Study

  • Zone & conduit model (segmentation blueprint)
  • OT risk assessment: threats, impacts, likelihood
  • Target Security Levels (SL-T) per zone
  • Gap analysis vs IEC 62443 requirements
  • Validation workshops with OT/IT stakeholders

Deliverables

  • Zones & conduits architecture document
  • SL-T targets per zone
  • Detailed IEC 62443 gap analysis report

Phase 3 — Security Roadmap

  • Prioritized deployment plan aligned to your risk register
  • Quick wins + phased programme
  • Budget scenarios for different security level targets
  • Change plan aligned to production schedule

Deliverables

  • Prioritized roadmap document
  • Budget scenario models
  • Quick-win action register

Phase 4 — Deploy with the AS OT Team

  • Network segmentation, industrial firewalls (Fortinet), iDMZ
  • Secure remote access: MFA, session control, jump hosts
  • OT monitoring & logging, asset discovery, SIEM integration
  • Hardening: baseline configs, application allowlisting
  • Resilience controls: backup strategy, restore tests, recovery procedures

Deliverables

  • Implemented & validated controls
  • Commissioning runbooks
  • Evidence captured for audit (change control)

Phase 5 — Govern

  • OT security policies & procedures
  • Evidence pack assembly for external audit
  • Audit coordination (e.g. TÜV)
  • Periodic review cadence & continuous improvement

Deliverables

  • Full policies & procedures library
  • Audit-ready evidence pack
  • NIS2 governance documentation

Measurable Outcomes

Security improvements that respect safety and uptime.

Reduced Attack Surface

Segmented OT network, controlled remote access, and hardened critical assets.

Improved Resilience

Validated backups, defined recovery procedures, and tested incident playbooks.

Audit-Ready Governance

Policies, procedures, and evidence pack aligned to IEC 62443 and NIS2.

Management Accountability

Clear ownership, reporting lines and evidence trail satisfying NIS2 Art. 20 requirements.

Compliance Framework

How NIS2 and IEC 62443
fit together.

IEC 62443 provides the technical OT security controls. NIS2 provides the governance, reporting, and management accountability framework. AS Secure Ops delivers both.

NIS2 — Governance & Resilience

  • Risk management measures
  • Incident handling & reporting (72h)
  • Business continuity & crisis management
  • Supply chain & third-party oversight
  • Management accountability & evidence

IEC 62443 — OT Security Controls

  • Zones & conduits (network segmentation)
  • Access control and authentication
  • System hardening and secure configuration
  • Monitoring, logging & anomaly detection
  • Security lifecycle for IACS components

Delivered in the field.

Why ASHELLAS

OT expertise. Engineering
discipline. No handoffs.
01

End-to-end in-house delivery

We do not stop at the report. Design, implementation, commissioning, and compliance documentation are all delivered by the same AS Engineering Team — no handoff to third parties for the hard parts.

OT-native engineers

Our team operates daily in PLC and SCADA environments. Security recommendations are made with full understanding of production constraints — uptime and safety are never compromised.
02

Leading vendor ecosystem

Solutions are built on established industrial security vendors (e.g. Siemens, Fortinet). We handle integration, configuration, and production validation — not just procurement.
03

Standards-based. Greek law expertise.

IEC 62443 is our technical reference. We bring deep familiarity with N. 5160/2024 and the Greek regulatory landscape — no translation layer required.
04
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Start with the Rapid
OT Security Review.

A 2–4 week engagement that gives you a clear picture of your OT security posture and a prioritized action plan. No commitment to further phases required.

  • Risk register & "as-is" OT security posture
  • Segmentation & remote access findings
  • High-level IEC 62443 & NIS2 gap snapshot
  • Executive debrief with prioritized next steps
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