Senior Cybersecurity Resilience Engineer

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

Job opening

Senior Cybersecurity Resilience Engineer

Hardening, segmentation, SOC/CERT oversight, and critical vulnerability management for sovereign environments. Security by design experience required.

You join RDMC's cybersecurity team to strengthen the resilience of critical systems (sovereign, industrial or regulated). You work from design to operations: secure architecture, hardening, detection and response.

The role combines hands-on technical expertise, Security by design rigor, and clear dialogue with business, ops and leadership teams.

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.

Profile

• 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.

Nice to have

• Certifications (OSCP, CISSP, ISO 27001 Lead Implementer)
• Private cloud / bare-metal and air-gapped environments
• OT/ICS or regulated-sector experience