Administer and maintain Linux servers (Red Hat, Debian, Ubuntu Server, CentOS) in operational condition
Operate and secure network infrastructures (switches, routers, firewalls, VPNs, load balancers)
Manage system and network incidents/problems at N2/N3 levels following ITIL processes
Participate in infrastructure evolution and transformation projects
Implement and maintain security standards: network segmentation, filtering rules, bastion hosts, Zero Trust principles
Automate operational tasks using Bash and Ansible
Ensure monitoring of environments (Centreon, Prometheus, Grafana) and perform performance analysis
Write and keep technical documentation up to date
Propose continuous improvements and enhancements to the infrastructure

Master’s degree (Bac +5) in Computer Science, Networking, or Information Systems (engineering school or equivalent)
Minimum 4–6 years of experience in production Linux and network environments
Advanced Linux administration skills: systemd, LVM, permissions, SELinux, patching, hardening
Strong networking knowledge: TCP/IP, VLANs, DNS, DHCP, routing, site-to-site and remote VPNs
Experience with application and web servers: Nginx, Apache, HAProxy, Tomcat, reverse proxy, SSL/TLS
Experience with virtualized (VMware, KVM, Nutanix) and containerized (Docker; basic Kubernetes concepts) environments
Automation expertise: advanced Shell/Bash, Ansible (playbooks, roles)
Familiarity with monitoring and log centralization tools: Centreon, Prometheus, Grafana, ELK/OpenSearch
Rigour, strong organizational skills and a solid RUN & operational maintenance (MCO) mindset
Ability to work cross-functionally with multidisciplinary teams
Good communication skills and the ability to adapt technical language to the audience

Linux & Network Infrastructure Engineer – Systems, Networking, Automation, Security

Key skills