Unix Systems Engineer

About the Position

Join Inetum as a Unix Systems Engineer to manage and maintain critical Unix/Linux environments, ensuring stability and security across AIX, RHEL, and Debian platforms.

Responsibilities

• Administer and troubleshoot complex Unix/Linux environments (AIX, RHEL, Debian);
• Install, configure, patch, and upgrade Unix/Linux systems and related components;
• Operate and support high-availability clusters (HP Serviceguard, Bull ARF, Pacemaker/Corosync);
• Perform advanced performance and system diagnostics across CPU, memory, storage, networking, kernel, and applications;
• Implement security hardening, permissions, SSH/PAM policies, firewall rules, audit logging, and vulnerability remediation;
• Integrate Unix/Linux systems with enterprise authentication (LDAP/AD, Kerberos, SSSD);
• Execute and validate backup, restore, DR, and failover procedures;
• Automate operational tasks using Bash, ksh, Python, and Ansible;
• Monitor system health, capacity, and performance, ensuring proactive issue detection;
• Collaborate with DBA, middleware, application, storage, backup, network, and security teams;
• Create and maintain technical documentation, runbooks, and operational procedures;
• Provide L3 support and resolve complex incidents across Unix/Linux platforms;
• Participate in on-call rotations, ensuring rapid response and SLA compliance;
• Plan and execute system migrations, lifecycle upgrades, and infrastructure improvements.

Requirements

• 5–10 years of experience in Unix/Linux administration in enterprise environments;
• Strong expertise in IBM AIX, Red Hat Enterprise Linux (RHEL), and Debian;
• Deep knowledge of Unix/Linux internals: boot process, services, package management, filesystems, LVM, multipath, networking, logging, and performance troubleshooting;
• Hands-on experience with high-availability clustering (Serviceguard, Bull ARF, Pacemaker/Corosync);
• Strong scripting and automation skills (Bash, ksh, Python, Ansible);
• Solid understanding of security, hardening, permissions, PAM/SSH, audit frameworks, and compliance;
• Familiarity with network protocols and services (TCP/IP, DNS, DHCP, NTP);
• Experience with VMware or equivalent virtualization platforms;
• Cloud knowledge (AWS, Azure, GCP) is a plus;
• Experience with monitoring and observability tools (Icinga, ScienceLogic, syslog, SNMP);
• Relevant certifications (RHCE, LPIC, AIX) are preferred;
• Fluent English;
• French or Dutch are a plus.

We Offer

• Opportunity to work with a European leader in digital services;
• Be part of a team of 28,000 consultants and specialists;
• Contribute to the digital transformation of businesses, public sector entities, and society;
• Competitive salary and benefits package.

About the Company

Inetum is a European leader in digital services. Inetum’s team of 28,000 consultants and specialists strive every day to make a digital impact for businesses, public sector entities, and society. Inetum’s solutions aim at contributing to its clients’ performance and innovation as well as the common good.

Present in 19 countries with a dense network of sites, Inetum partners with major software publishers to meet the challenges of digital transformation with proximity and flexibility.

Driven by its ambition for growth and scale, Inetum generated sales of 2.5 billion euros in 2023.