NIS2 Compliance for CIOs: Network Requirements and Action Plan

NIS2 compliance for CIOs: network requirements, prioritized action plan, budget, checklist, and deadlines. Effective in France in 2025. Fines of up to €10M or 2% of revenue. This practical guide helps CIOs manage compliance.

Determine whether your organization is in scope

• Essential entity (EE): critical sectors + >250 employees or >€50M
• Important entity (EI): other sectors + >50 employees or >€10M
• Verification: ANSSI declaration
• Notification deadline: October 2025 in France

Key requirements

• Governance: the CEO is legally accountable
• Formal annual risk analysis
• 'Appropriate' technical + organizational measures
• Incident notification within <24h (alert) + 72h (report) + 1 month (final report)
• Supply chain security
• Appropriate cryptography + MFA

Required technical network measures

• Segmentation + microsegmentation
• ZTNA / secure VPN
• NGFW with SSL inspection
• SIEM + 24×7 SOC (or outsourced)
• EDR on endpoints
• Offline backup + recovery testing
• Data encryption at rest + in transit
• Log retention for at least 1 year

12-month action plan

Q1 (months 1-3): audit

• Gap analysis against NIS2
• ICT asset inventory
• Risk analysis
• Action prioritization

Q2 (months 4-6): quick wins

• MFA everywhere
• EDR deployment
• Tested 3-2-1 backup
• Strict patch management

Q3 (months 7-9): segmentation

• DC microsegmentation
• VPN-to-ZTNA migration
• SIEM + centralized logs

Q4 (months 10-12): validation

• Penetration test + red team
• Complete documentation
• Compliance dashboard
• Team + ExCom training

Indicative budget

• EI SME (50-250 employees): €80-200k for compliance
• EE mid-market company (250-2000): €500k-€2M
• Large enterprise: €5-20M

Penalties

• EE: up to €10M or 2% of global revenue
• EI: €7M or 1.4% of revenue
• Executives: €1M personal fine
• Possible suspension of operations

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