Julien Bélier

Administration, maintenance, and monitoring of a fleet of over 200 Windows workstations.

Preparation, installation, optimization, and hardening of Windows systems, network configuration.

Preventive and corrective maintenance on-site or remotely, rapid diagnosis, and service restoration.

Management of management servers: evolution of legacy platforms (obsolete physical servers) towards virtualized environments, then progressive migration to suitable OS on centralized solutions like ESX.

Full version upgrade of the CMBD, plugin integration, creation and modification of SQL databases, deployment and updates of agents, web server security, backup plan.

Implementation of automated backups and documentation.

Management and maintenance of NAS servers.

User support for industrial workstations, laboratory equipment control, and testing machines. Diagnosis and resolution of software (process) or hardware (Windows, licenses, drivers, configurations, and industrial specifics) failures. Assistance with incomplete configurations or integration.

Remote maintenance via secure control tools, spontaneous troubleshooting, and restoration of critical services.

Management of local backups and rapid restoration procedures.

Participation in defining software standards for the industrial IT park.

Design of a complete home infrastructure for technological watch and experimentation in systems administration, networks, and security.

Virtualized environment under Proxmox hosting several services: Pi-hole (DNS/DHCP and network monitoring), Grafana (dashboards), Home Assistant (home automation), and a GLPI/MariaDB server for testing and backups.

Experimentation with automation and deployment via Docker, Kubernetes, and Ansible.

Setup of a Kali Linux server dedicated to vulnerability testing and cybersecurity training (TryHackMe).

Development of an open-source project published on GitHub — docx-to-md — a local DOCX to Markdown converter with image extraction, designed using Python (venv) and Visual Studio Code.

Complete documentation of procedures, overall monitoring, and continuous improvement of the environment's security and reliability.

Key skills: Proxmox, Debian Linux, MySQL, Python Development, Scripting.