About Josselin
French
Native or bilingual
English
Conversational
Experience
- Minitere de l'intérieurInformation Security ExpertPUBLIC SECTORSeptember 2023 - October 2024 (1 year and 1 month)Paris, FranceStrategic & Governance MissionsDraft, maintain, and implement the PSSI into operational procedures, charters, and access policies.Conduct risk analyses (EBIOS RM) and establish treatment plans.Regulatory watch: GDPR, ANSSI (RGS), ISO 2700x; contribute to the SSI strategic plan.Technical Operational MissionsDeploy vulnerability audit solution; manage patch management and hardening (CVSS prioritization).SI monitoring with the SIC team: monitoring, alert correlation, dashboards, and on-call duty.Supervise SIEM, EDR, IAM, PAM, DLP systems.Coordinate incident response, forensic investigations, lessons learned, and DR/BCP management.Manage network segmentation (VLAN, DMZ) and perimeter architectures.Deploy and administer white label stations across the national territory and overseas departments and territories; train each local team on their use.Administer Capitole: manage accounts, rights profiles, authorizations, and group memberships.Awareness & TrainingDesign and conduct awareness campaigns: e-learning, phishing workshops, social engineering, crisis simulations.Write best practice guides, quick reference sheets, and cyber newsletters.Cyber onboarding for new arrivals; train business referents on Capitole.Project & Consulting MissionsSecurity by Design for IT projects: ASA files, risk analyses, market security clauses.Security certifications; DevSecOps support; audit management (pentest) and remediation.
- Ministere de l'interieurIT Support Technician – Systems, Networks & Infrastructure ExpertisePUBLIC SECTOROctober 2024 - October 2025 (1 year)Paris, FranceSupport & Incident ResolutionHandle tickets escalated from lower levels and conduct in-depth diagnostics.Analyze, isolate, and resolve complex incidents: system failures, application conflicts, network malfunctions.Ensure follow-up of critical incidents until full resolution, respecting SLAs.Systems & Networks AdministrationManage accounts, rights, and group policies via Active Directory.Configure and maintain network equipment: VPN, LAN, Wi-Fi, firewall.Deploy and maintain servers as well as workstations.Configure and manage professional Android phones (MDM enrollment, profiles, security policies).Level 2 – Field & ProximityDirectly assist users with hardware and software troubleshooting.Ensure IT asset management: inventory, renewal, equipment traceability.Support users in adopting tools and best IT practices.Automation & ScriptingCreate automation scripts to optimize recurring tasks (PowerShell, Bash, Python, Rust, NodeJS...).Automate deployments, updates, and configuration management.Contribute to the industrialization of support processes.N3 Expertise & EscalationHandle critical infrastructure and security incidents.Collaborate with engineering teams and vendors to resolve fundamental issues.Participate in infrastructure evolution projects.Documentation & Continuous ImprovementWrite and maintain technical procedures and knowledge bases.Train and support technicians on new issues.Contribute to the improvement of ITSM processes according to the ITIL framework.
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