Freelancer profile translated to English.
Back to original languageAbout Sébastien
Production-oriented Systems Engineer, I work on Windows/Linux environments and virtualised infrastructures where stability, rigor, and quality of service are essential. I enjoy structuring, automating, and making operations reliable: creating procedures, setting up KBs, optimizing processes, managing AD/GPO, PowerShell scripting, and automation with Ansible.
I have participated in several infrastructure and supervision projects (Centreon, F5, WebDNS), as well as in the operational maintenance of critical platforms. I work on both the technical side (server maintenance, VMware virtualization, basic network management) and the functional side: coordination with teams, incident, problem, and change management, service monitoring, and communication with business units.
My approach is simple: understand the need, secure the existing, improve what can be improved, and facilitate the daily work of the teams. I prioritize transparency, reliability, and a job well done.
Areas of expertise
Windows Server & Linux Administration
Active Directory, GPO, LDAP
Automation: PowerShell,
Supervision: , F5, WebDNS
VMware / ESXi Virtualization
Production Management & Service Delivery
Documentation, procedures, KB
Incident, Problem, and Change Management (ITIL)
French
Native or bilingual
English
Conversational
Can work on-site
Montpellier (up to 30km)
Experience
- InsermWorkstation Engineer/Deputy SDMFebruary 2024 - December 2025 (1 year and 10 months)Montpellier, FranceInfrastructure & Service Delivery Expert, I work on critical environments where reliability, automation, and quality of service are essential. I structure, optimize, and secure IT operations by combining technical expertise and operational management.I design and maintain procedures, KBs, and project documents (backups, masters, AD, GPO), while automating key tasks via PowerShell: AD management, GPO adjustments, silent installations, workflow optimization. Objective: reduce errors, speed up operations, and industrialize environments.On the project side, I defined the supervision scope, ensured Linux/Windows maintenance on VMware/ESXi infrastructures, and guaranteed the operational maintenance of sensitive platforms (including Weather projects). I supervise teams and advanced tools like F5 and WebDNS, and .On the functional side, I act as a Service Delivery Manager: production service management, cross-functional coordination, communication with business teams, and leadership of a multidisciplinary team (L1 to architects). I manage incidents, problems, changes, contracts, and operational performance, while prioritizing actions to minimize impact on production and maximize delivered value.Environments: MDT, OCS, Windows 7/10/11, Windows Server 2012–2022, macOS, AD, LDAP, EfficientIP, LAN/WiFi/ToIP Cisco, VMware ESXi, Outlook/Thunderbird, ITSM tools.
- IRDWorkstation Engineer/Support CoordinatorMay 2023 - February 2024 (9 months)Montpellier, France: Support to the infrastructure manager and the desktop engineerL2/L3 Workstation Support• • Management of the client master (Linux/Windows) (updates and evolution)• • Implementation of procedures and KBs• • Project creation and updates (Backup, Master, Active Directory Account, GPO)• Quality work on N3 ticket tool management in collaboration with the Support Service.• • PowerShell scripting for adjusting existing procedures with new requirements (GPO, Active Directory).• • Management of the Atempo backup tool (operational maintenance + tool adjustments according to IRD needs.Participation in client projects:• • MOBILE Telephony• • INTUNE• • LINUX (new master)• • LINA (backup)• • MATINFO5 portal with HP• • Update of Windows MASTERS and workstation profiles.• • OCS (inventory) Work with the service center and local support on technical blocking pointsTechnical Environment: MDT, OCS, Windows 7/10, Macintosh, Active-Directory, EfficientIP, LDAP, LAN, Wifi, 3G, Cisco ToIP. Videoconferencing (Polycom and Evo software). Outlook, Thunderbird. Incident management software: Itop
- Comité départemental Bouche du Rhône-InetumSystems EngineerDecember 2022 - March 2023 (3 months)Marseille, FranceMain• • Implementation and management of projects• • Deploy a set of software (update or installation) after studying access conditions and all rights.• • Implement new services and methods for users• • Operationally manage the IT park throughout the value chain (installations, updates…).• • Collect user needs and propose continuous improvements• • Manage the MCO (Maintenance in Operational Condition) for workstations, routers, servers, network infrastructures.• • Monitor stocksMaintenance & Administration• • Perform regular maintenance of server status, licenses, and cybersecurity.• • Administer email (connection, operation…).• • Ensure the fluidity of the IT system by identifying and quickly resolving failures.• • Propose new processes.• • Check all system blocking points. Support and Cross-functional work• • Assist all business teams (Marketing, Human Resources, Finance…) in operationally using equipment and software.• • Listen to the needs of each stakeholder and propose solutions adapted to their needs to facilitate their work.• • Work cross-functionally with all stakeholders to ensure the deployment and continuous improvement of the IT park.• • Local interventions• • Counter interventions• • Interventions on Xerox copiers• • Workstation imaging and configuration• • Incident ticket monitoring with HP Service Manager• • Incident ticket monitoring with ServiceNow (following ticket tool change)• Updates of IT park movements with the "Device Service Management Tool" (DSMT).
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Education
- BTS ACO2005BTS ACO
- E-learning Training Network Administration Cybersecurity Specialization2007Formation e-learning Administration réseau spécialisation Cybersécurité
Certifications
- Cisco DiscoveryCesi2012