Senior Security Resilience Engineer for Critical Systems

Rdmc; Île-de-France; Remote; EUR 75,000 - 110,000; Full time

Job summary

RDMC is seeking a Senior Cybersecurity Resilience Engineer to strengthen critical systems in sovereign and regulated environments. You will cover secure architecture, hardening, detection and response from design to operations.

The role blends hands-on security expertise with Security by design rigor and clear dialogue with business, ops and leadership teams. Fluency in technical English and French is required, with strong SOC/SIEM and vulnerability-management skills.

Qualifications

• Proven experience in offensive and/or defensive security on critical environments.
• Strong SOC/SIEM, pentest, hardening and vulnerability-management skills.
• Familiarity with CSTI / ANSSI frameworks or equivalents is a plus.
• Able to prioritize business risk and communicate clearly.
• Technical English; fluent French.

Responsibilities

• Design and evolve secure architectures (segmentation, Zero Trust, OS/network hardening).
• Contribute to or lead SOC/CERT activities: detection, investigation, containment, post-mortems.
• Own critical vulnerability lifecycle (prioritization, remediation, reporting).
• Define and industrialize Security by design controls (CI/CD, reviews, baselines).
• Produce documentation, runbooks and awareness materials for teams.

Skills

SOC/SIEM

Penetration testing

Hardening

Vulnerability management

Offensive security

Job description

RDMC is seeking a Senior Cybersecurity Resilience Engineer to strengthen critical systems in sovereign and regulated environments. You will cover secure architecture, hardening, detection and response from design to operations.

The role blends hands-on security expertise with Security by design rigor and clear dialogue with business, ops and leadership teams. Fluency in technical English and French is required, with strong SOC/SIEM and vulnerability-management skills.