Freelancer profile translated to English.
Back to original languageAbout Rémy
Passionate about information system security, I support companies in protecting, strengthening, and optimizing their IT infrastructures.
With several years of experience in systems and network engineering, I now act as a cybersecurity expert to secure on-premise, cloud, and hybrid environments.
🔐 My areas of expertise:
- Securing systems & network infrastructures (Windows, Linux, Cisco, Fortinet, Palo Alto, etc.)
- Audit and hardening of configurations (servers, firewalls, Active Directory, workstations)
- Vulnerability management and compliance (ISO 27001, ANSSI, GDPR, NIS2)
- Incident detection and response (SOC, SIEM, EDR, forensic)
- Securing cloud environments (Azure, AWS, GCP)
- Implementation of security policies and business continuity plans (BCP/DRP)
🎯 My approach:
Combining technical rigor with strategic vision to offer solutions tailored to each context, without compromising operational performance.
I strive to create secure, resilient, and scalable environments, while supporting internal teams in skill development.
🚀 What I can bring you:
- A clear diagnosis of your security flaws and priorities
- Support in compliance and remediation
- Robust and hardened network and system architectures
- Measurable improvement of your overall security posture
French
Native or bilingual
English
Fluent
Can work on-site
Brest (up to 50km), Quimper (up to 50km), Lorient (up to 50km), Paris (up to 30km), La Rochelle (up to 50km)
Experience
- ASSIASystems and Network Infrastructure AdministratorSOFTWARE PUBLISHINGNovember 2022 - May 2025 (2 years and 6 months)Quimper, FranceAdministration of ASSIA's network and approximately 450 virtual machines + backup site. Activity monitoring, maintenance, and supervision of the network, and the system infrastructure and its network. Securing access to ASSIA's applications and global network.IT Security:- Implementation of a vulnerability scanner on the network and VMs- Management of an internal SOC (SIEM, Vulnerabilities, XDR)- Log centralization and automation of security tasks.- PSSI complianceNetwork Administration:- Management of a Checkpoint firewall cluster- Management of Cisco switches (VLAN management, filtering, routing)- Reverse proxy: service implementation, securing private and public access- Customized VPNSystems Administration:- VMware vSphere, vCenter: maintenance, network configuration, vSAN, creation of Linux Redhat and Debian templates- VMware NSX: networking, access security- Linux Red Hat and CentOS servers, Windows Server- Veeam Backup backupsCloud Technologies:- Microsoft Entra- Teams and Teams telephony management
- Communauté de communes du Pays Bidouden SudSystems and Network TechnicianPUBLIC SECTORSeptember 2022 - October 2022 (1 month)Pont-l'Abbé, FranceInternship during TSSR ENI trainingCreation of a map of the CC's system and network infrastructure.Independent work, L1/L2/L3 support.Analysis of network shares and review of rights on the Windows domainImplementation of GLPI: server installation and security configuration, workstation integration.Virtualization of the main server and division of Windows roles. Creation of Windows and Linux VMs to separate network services and business application services.
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Education
- Master's degree in Digital Security ExpertENI School of Computer Science x ESD Academy x ASTON2025Audits de sécurité : réalisation d'audit de sécurité et mise en place de solutions cyberdéfense Pentest : tests de pénétration et tests de sécurité simulés et réels, OSINT, ingénierie sociale. Utilisation de méthodes de pénétration réelles, apprentissage de la découverte des techniques d'infiltration numérique et vol de données SOC et réméditiation : mise en place du Security Operations Center et de mesures de rémédiation et réponse à incident. Déploiement de SIEM sur mesure, déploiement de mesures de sécurité, hardening serveurs, réseau, et postes. Gouvernance : projets de mise en conformité numérique. Utilisation des méthodes EBIOS RM et ISO27005 (analyse de risques) et conformité avec les référentiels ISO27001, ISO27002 (mise en place du SMSI). Conformité avec les règlementations européennes et française en matière de protection des données et systèmes sécurisés (ANSSI, NIS2, SOC2, etc) Projets informatiques de sécurisation de la donnée. Gestion de projets.
- Bachelor's degree in Systems and Network AdministratorENI School of Computer Science2024Administration systèmes : admnistration complète d'un domaine entreprise sur Windows et Linux, applications command-line, gestion des services, scripting. Gestion des postes et des utilisateurs. Réseaux et sécurité : Cisco CCNA, routage, certification Stormshield, sécurité du réseau (NAC, RADIUS, protocoles Wifi), déploiement de solutions de sécurité des postes (EDR, authentification réseau) Gestion BDD : Bases SQL Microsoft et solution libres MariaDB, PGSQL. Virtualisation de serveurs et microservices : Virtualisation sur KVM, VMWare, Hyper-V. Automatisation avec Ansible et Terraform. Déploiement de microservices Docker et Kubernetes. Conversion de systèmes monolithique vers microservices. Gestion des versions avec Git. Gestion de projets informatiques : conception d'infrastructure systèmes et réseau complexes et modernes (datacenter, microservices, réseaux exposés sur internet, etc)