As a Linux System Administrator at Inetum, you will play a crucial role in ensuring the availability, performance, and security of Linux server environments for our diverse clientele. You'll deliver operations, automation, and Level 2/3 support while participating in a rotating on-call duty to maintain service continuity.CONTEXTJoin a shared services team of five administrators dedicated to supporting multiple client environments in a multi-tenant architecture.Take responsibility for the operational availability, performance, and security of our Linux infrastructure across both on-premises and cloud platforms.Engage in a rotating on-call schedule to uphold service continuity as per contractual SLAs.Main Responsibilities:System Administration:Install, configure, and maintain Linux servers (such as Ubuntu, Debian, CentOS, RHEL).Perform regular patching, upgrades, and system hardening.Manage users, groups, permissions, and access policies effectively.Ensure system stability, performance, and carry out capacity planning.Shared Services and Platforms:Oversee shared services (e.g., DNS, NTP, SMTP relays, web servers, file servers).Provide support to application teams utilizing the shared Linux infrastructure.Maintain and optimize virtualization and/or container platforms (VMware, KVM, Docker, Kubernetes, based on the environment).Contribute to the standardization of environments and configurations across teams.Monitoring, Incident Management, and On-call:Configure and maintain monitoring and alerting tools (e.g., Zabbix, Prometheus, Nagios, Grafana).Investigate and resolve incidents affecting shared systems and services.Participate in a rotating on-call duty schedule (24/7 support):Respond to alerts within defined SLAs.Conduct first-level analysis, mitigation, and escalate issues as necessary.Communicate effectively with stakeholders during major incidents.Contribute to post-incident reviews (RCA) and ongoing improvement actions.Security and Compliance:Implement security best practices and hardening guidelines on Linux systems.Collaborate with security teams to identify, prioritize, and remediate vulnerabilities.Manage firewalls, VPN access, and ensure secure remote access (SSH, bastion/jump hosts).Ensure compliance with internal policies and external regulations when applicable.Backup, Recovery, and Continuity:Regularly test recovery and disaster scenarios.Assist in defining and meeting RPO/RTO targets for critical services.Automation and Industrialization:Utilize scripting languages (Bash, Python, etc.) to automate repetitive operational tasks.Employ configuration management tools (e.g., Ansible, Puppet, Chef, SaltStack) to maintain consistent environments.Contribute to infrastructure as code and standard operating procedures.
Mar 11, 2026
