NIS2 Compliance for Energy in Greece
In short: Energy is a NIS2 Annex I sector in Greece: large organisations are Essential Entities (fines up to €10M or 2% of global turnover), medium ones Important Entities. In-scope entities must apply the Article 21 security measures and report significant incidents to GR-CSIRT within 24 hours, 72 hours and one month.
The energy sector — including electricity, oil, gas and district heating — is classified as highly critical under NIS2 Annex I. Large operators are Essential Entities; medium-sized operators are Important Entities. Disruptions can cascade across national infrastructure.
Reporting to National Cybersecurity Authority (ENISA-GR) / GSRT
Energy entities in Greece report significant cybersecurity incidents to GR-CSIRT, operating under National Cybersecurity Authority (ENISA-GR) / GSRT. The NIS2 Article 23 timeline applies:
- 24 h Early warning — notify GR-CSIRT
- 72 h Formal incident notification with initial assessment
- 1 month Final incident report with root cause and remediation
Key cyber risks for Energy in Greece
- ▸OT/ICS attacks targeting SCADA systems
- ▸Ransomware causing grid outages
- ▸Supply-chain compromise of energy management software
- ▸Insider threats in critical control centres
Key NIS2 obligations for Energy entities
- ✓Network security measures for operational technology (OT)
- ✓72-hour incident notification to national authority
- ✓Supply-chain security assessments for ICS vendors
- ✓Business continuity and crisis management plans
- ✓Regular penetration testing of OT environments
Example in-scope organisations
- ·Electricity transmission and distribution operators
- ·Natural gas suppliers and distributors
- ·Oil pipeline operators
- ·District heating networks
- ·Renewable energy platform operators
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Frequently asked questions
Is my Energy organisation in scope for NIS2 in Greece?
Yes — if you are a medium or large organisation. In Greece, Energy is a NIS2 Annex I sector. Large organisations are Essential Entities; medium organisations are Important Entities. Transposed via Law 5160/2024; the National Cybersecurity Authority within the Ministry of Digital Governance supervises compliance. Use our free scope checker for a personalised result.
Who do I report NIS2 incidents to in Greece as a Energy entity?
Report significant incidents to GR-CSIRT (National Cybersecurity Authority (ENISA-GR) / GSRT). You must submit an early warning within 24 hours, a detailed notification within 72 hours, and a final report within one month — per NIS2 Article 23.
What security measures must Energy organisations implement under NIS2 in Greece?
Under NIS2 Article 21, organisations must implement risk-proportionate security measures including: Network security measures for operational technology (OT); 72-hour incident notification to national authority; Supply-chain security assessments for ICS vendors. Additional requirements may apply under Greece's national transposition.
What are the NIS2 fines for Energy organisations in Greece?
Essential Entities face fines up to €10 million or 2% of global annual turnover under NIS2 Article 34. Greece's national transposition may set specific enforcement priorities and fine scales.
Related sectors in Greece
Official sources
- NIS2 Directive (EU) 2022/2555 — EUR-Lex
- DORA Regulation (EU) 2022/2554 — EUR-Lex
- ENISA — EU Agency for Cybersecurity
Last reviewed: 2026-07-03
For decision-support purposes only. Exact scope depends on Greece's national transposition of NIS2 — verify obligations with a qualified expert.