Inetum is looking for a Linux System Administrator to ensure the availability, performance, and security of Linux Server environments and related services for a diverse set of clients. You will deliver operations, automation, and dedicated Level 2/3 support, including participation in an on-call rotation.
What You'll Do
- Install, configure, and maintain Linux servers (e.g. Ubuntu, Debian, CentOS, RHEL).
- Perform regular patching, upgrades, and system hardening.
- Manage users, groups, permissions, and sudo/access policies.
- Ensure system stability, performance, and capacity planning.
- Administer shared services (e.g. DNS, NTP, SMTP relays, web servers, file servers).
- Support application teams using the shared Linux infrastructure.
- Maintain and optimize virtualization and/or container platforms (VMware, KVM, Docker, Kubernetes).
- Contribute to standardizing environments and configurations across multiple teams.
- Configure and maintain monitoring and alerting tools (e.g. Zabbix, Prometheus, Nagios, Grafana).
- Investigate and resolve incidents affecting shared systems and services.
- Respond to alerts within defined SLAs, performing first analysis, mitigation, and escalation when needed.
- Communicate clearly with stakeholders during major incidents.
- Contribute to post-incident reviews (RCA) and continuous improvement actions.
- Apply security best practices and hardening guidelines on Linux systems.
- Work with security teams to identify, prioritize, and remediate vulnerabilities.
- Manage firewalls, VPN access, and secure remote access (SSH, bastion/jump hosts).
- Ensure compliance with internal policies and external regulations where applicable.
- Regularly test recovery and disaster scenarios, helping to define and meet RPO/RTO targets.
- Use scripting (Bash, Python, etc.) to automate recurring operational tasks.
- Use configuration management tools (e.g. Ansible, Puppet, Chef, SaltStack) to maintain consistent environments.
- Contribute to infrastructure as code and standard operating procedures.
- Create and maintain clear technical documentation, runbooks, and on-call procedures.
- Collaborate closely with application, network, security, and other support teams.
- Share knowledge within the team and help onboard new colleagues.
- Participate actively in team meetings, capacity reviews, and planning sessions.
What We're Looking For
- 3–5 years of Linux administration in operations/run environments.
- Strong troubleshooting, communication, and teamwork skills.
- Fluent in English.
- Able to work under on‑call conditions.
- Hands-on experience with Linux administration (Ubuntu/Debian/CentOS/RHEL).
- Proficiency in system setup, configuration, hardening, users & permissions, SSH, and package management.
- Understanding of networking basics (TCP/IP, DNS, routing, firewall).
- Experience with web servers (Apache, Nginx) and log management.
- Familiarity with monitoring (Zabbix/Prometheus/Nagios), backups, and Bash scripting.
- Experience in production troubleshooting and performance diagnostics.
- High sense of responsibility and ability to remain calm under pressure.
- Clear communication with technical & non-technical teams.
- Organized, structured, and improvement‑oriented approach.
- Willingness to participate in rotating on‑call schedules.
- Commitment to fast alert response and remote troubleshooting.
Nice to Have
- Experience with virtualization (VMware/KVM) and container platforms (Docker/Kubernetes).
- Familiarity with configuration management (Ansible/Puppet/Chef/SaltStack) or IaC (Terraform/CloudFormation).
- Exposure to cloud platforms (AWS/Azure/GCP) and CI/CD tools.
- Knowledge of security frameworks (CIS/ISO/NIST).
Technical Stack
- Operating Systems: Ubuntu, Debian, CentOS, RHEL
- Services: DNS, NTP, SMTP, Apache, Nginx
- Monitoring & Observability: Zabbix, Prometheus, Nagios, Grafana
- Virtualization & Containers: VMware, KVM, Docker, Kubernetes
- Scripting & Automation: Bash, Python, Ansible, Puppet, Chef, SaltStack
- Infrastructure as Code: Terraform, CloudFormation
- Cloud Platforms: AWS, Azure, GCP
Team & Environment
You will join a shared services team of 5 administrators supporting multiple client environments in a multi-tenant model.
