Freelancer profile translated to English.
Back to original languageAbout Leger Gerard
Experienced Systems and Networks Administrator, specializing in advanced N2/N3 support, escalation management, and operational maintenance (MCO) of critical infrastructures. Proven expertise in Microsoft 365 environments (Exchange Online, Intune, Entra ID), virtualization (VMware, Hyper-V, Proxmox), and cybersecurity (GPO, MFA, CyberArk). Focused on continuous improvement, service quality, and the application of ITSM best practices (Jira, ServiceNow) to ensure optimal system reliability and performance.
French
Native or bilingual
English
Basic
Can work on-site
Paris (up to 50km)
Experience
- ALTAMSystem and Network AdministratorARCHITECTURE AND URBAN PLANNINGApril 2025 - Today (1 year and 2 months)Paris, FranceUSER SUPPORT FOR ALL LEVELS AND WORKSTATION MANAGEMENT ENSURING RAPID RESOLUTION OF LEVEL 1, 2, AND 3 INCIDENTS.DEPLOYMENT, ADMINISTRATION, AND OPTIMIZATION OF MICROSOFT 365 SERVICES AND IDENTITY VIA MICROSOFT ENTRA ID AND MOBILE FLEET MANAGEMENT WITH INTUNE.ADMINISTRATION AND MAINTENANCE OF SEVERAL VIRTUALIZATION PLATFORMS VMWARE, HYPER-V, PROXMOX TO ENSURE HIGH AVAILABILITY OF SERVICES.DEPLOY, UPDATE, AND MAINTAIN BUSINESS APPLICATIONS.OPERATIONAL MANAGEMENT OF PRINTERS AND MOBILE FLEET VIA AIRWATCH AND ATEM TOOLS.
- GROHEPROXIMITY SUPPORT TECHNICIANREAL ESTATEFebruary 2023 - March 2024 (1 year and 1 month)Courbevoie, FranceCritical Migration: Active participation in migrating an on-premise SharePoint environment to SharePoint Online (Cloud), ensuring business continuity for users.Advanced N2/N3 Diagnostics and Resolution: Reduction of downtime by effectively diagnosing and resolving complex incidents.Server Administration: Daily administration of Windows Server and Linux servers.Performance Optimization: Monitoring and optimizing system performance to improve infrastructure responsiveness.ITSM Incident Management: Handling and resolving tickets via ITSM tools, ensuring adherence to Service Level Agreements (SLAs).PROXIMITY SUPPORT TECHNICIAN – SFR, BFM75017 Paris, France | August 2018 - November 2021Account and Security Management: Creation and management of user accounts in Active Directory, MS 365, Azure AD, and Exchange.Access Security: Deployment of multi-factor authentication (MFA) for 100% of users and management of SharePoint access security.VIP and Application Support: Provision of Level 2 business application support, with specific follow-up on incidents and requests from VIP users.Financial and Tools Management: Management of Office 365 license billing and configuration of videoconferencing systems (Cisco Webex, MS Teams).
- SFR, BFM, RMCPROXIMITY SUPPORT TECHNICIANTELECOMMUNICATIONSAugust 2018 - November 2021 (3 years and 3 months)Paris, FrancePROXIMITY SUPPORT TECHNICIAN – SFR, BFM75017 Paris, France | August 2018 - November 2021Account and Security Management: Creation and management of user accounts in Active Directory, MS 365, Azure AD, and Exchange.Access Security: Deployment of multi-factor authentication (MFA) for 100% of users and management of SharePoint access security.VIP and Application Support: Provision of Level 2 business application support, with specific follow-up on incidents and requests from VIP users.Financial and Tools Management: Management of Office 365 license billing and configuration of videoconferencing systems (Cisco Webex, MS Teams).
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Education
- TSSRDORANCO2022La formation Technicien Supérieur Systèmes et Réseaux (TSSR) est un titre professionnel de niveau 5 (équivalent Bac + 2) en informatique centré sur l’exploitation, la maintenance et la sécurisation des systèmes et réseaux d’entreprise : serveurs, postes, virtualisation, services réseau, support utilisateurs, etc. Elle est définie par un référentiel officiel inscrit au RNCP et vise à rendre opérationnel·le sur l’ensemble des compétences clés du métier. Ce que couvre typiquement le contenu de la formation TSSR : Compétences générales visées Assister et accompagner les utilisateurs (support, helpdesk, communication technique). Exploiter l’infrastructure informatique et réseau (serveurs, postes clients, services). Maintenir, sécuriser et faire évoluer l’infrastructure (sauvegarde, virtualisation, automatisation). Principaux modules / blocs de compétences (illustratifs des formations) (ça peut varier un peu selon l’organisme, mais le référentiel RNCP reste la base) Exploitation des éléments de l’infrastructure et support Support utilisateurs (centre de services, ticketing, diagnostic). Exploitation des serveurs Windows Server (Active Directory, DNS/DHCP). Exploitation des serveurs Linux (services réseau, permissions). Exploitation et configuration de réseaux IP (adressages, commutation). Maintenance, évolutions et sécurisation Administration des environnements virtualisés (hyperviseurs, VMs). Automatisation des tâches via scripting (Batch, PowerShell, Shell). Mise en place, tests et restauration des sauvegardes. Mise en œuvre de mesures de sécurisation des accès, interconnexions et services réseau. Maintenance des services de déploiement des postes de travail. Contenu pratique Travaux pratiques intensifs sur Windows et Linux. Configuration d’environnements réseau réels. Projets de scripting et automatisation. Mise en place de plans d’adressage IP, VLAN, services réseau. Stage ou période en entreprise (souvent 200-280 h selon organisme). Transversal Anglais technique. Savoir-être professionnel (communication, organisation, veille). Objectif certification La formation est structurée autour des blocs de compétences du référentiel RNCP : Assister utilisateurs en centre de service. Maintenir, exploiter et sécuriser une infrastructure centralisée. Maintenir, exploiter une infrastructure distribuée et contribuer à sa sécurisation.