Freelancer profile translated to English.
Back to original languageAbout Mathieu
🛡️ Infrastructure & cybersecurity engineer, I offer configuration audits on Linux environments, Stormshield firewalls (SNS), and virtualised infrastructures.
🎯 Goal: identify configuration deviations, propose concrete and prioritised recommendations, and strengthen your systems' security according to ANSSI best practices.
🔍 Strong expertise in ANSSI frameworks:
GHI, NT_Admin, NT_Journal, RGS, IT hygiene guide...
Implementation in demanding environments such as PDIS, PRIS, PASSI.
📋 Certifications:
• CSNA – Certified Stormshield Network Administrator
• CSNE – Certified Stormshield Network Expert
• NCP-MCI & NCM-MCI – Nutanix Certified Professional & Master – Multicloud Infrastructure
🔐 Specialisations:
• Linux Audit (SSH, services, permissions, logs, etc.)
• Stormshield SNS firewall audit
• Secure architecture for virtualised infrastructures
• Hardening according to ANSSI guides
• Writing clear and actionable technical reports
📅 Availability: evenings and weekends.
🔁 Remote or on-site intervention possible (depending on location).
French
Native or bilingual
English
Fluent
Can work on-site
Toulouse (up to 50km)
Experience
- Sopra SteriaSystem and network administration – Cybersecurity infrastructures (PDIS, PRIS, PASSI)DIGITAL AND ITFebruary 2022 - Today (4 years and 5 months)Toulouse, FranceResponsible for the design, deployment, and production maintenance of cybersecurity services within the Cybercentre, with a focus on security, reliability, and automation.Key missions and achievements:• Proactive infrastructure monitoring to ensure the availability and security of critical services.• Management and resolution of production incidents, with root cause analysis and implementation of corrective measures.• Configuration and maintenance of network and security equipment: switches, firewalls (Stormshield, etc.), VPNs, Linux servers.• Automation and standardization of deployments via Ansible, reducing errors and accelerating builds.• Adherence to and application of ANSSI best practices for hardening systems and network equipment.
- SopraSteriaCybersecurity engineer – SSI Team | Compliance and risk managementDIGITAL AND ITApril 2025 - Today (1 year and 4 months)Toulouse, FranceMember of the Information System Security team, responsible for compliance, incident management, and audit preparation in a sensitive environment (PDIS, PRIS, PASSI).Key missions and achievements:• Security incident management: analysis, resolution, and follow-up, with continuous process improvement.• Active participation in security committees and definition of corrective action plans.• Development and monitoring of control plans to ensure compliance with internal and ANSSI frameworks.• Preparation and support for internal and external audits, with the production of clear reports and concrete recommendations.• Contribution to the implementation of ANSSI best practices to enhance system and service security.• Collaboration with business teams to align security and operations.
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Education
- Computer Security EngineerNational Institute of Applied Sciences Centre Val de Loire2022Titre : Ingénieur en Sécurité informatique Enseignement d’approfondissement de 4e année : Big Data Option de 5e année : Architecture, Administration, Audit et Analyse de Sécurité (4AS) Cursus : • Sécurité informatique ; • Administration systèmes et réseaux ; • Programmation ; • Mathématiques pour ingénieur ; • Communication éthique ; • Monde de l'entrepreneuriat et des organisations ; • Droit de l'informatique ; • Ouverture internationale.
Certifications
- LFCA: Linux Foundation Certified IT AssociateThe Linux Foundation2022
- LFCS: Linux Foundation Certified Systems AdministratorThe Linux Foundation2023