Inetum is hiring an Unix Systems Engineer

We are seeking a highly skilled and experienced Linux/Unix System Administrator to join our IT team. The ideal candidate will be responsible for the administration, configuration, and maintenance of our Unix-based systems. This role requires deep technical knowledge of Unix operating systems, as well as strong problem-solving and communication skills. The role requires hands-on expertise with enterprise Unix/Linux platforms, specifically IBM AIX, Red Hat Enterprise Linux (RHEL) and Debian, including production operations, troubleshooting, patching, automation, security hardening and high-availability clustering. Act as a Level 3 technical reference for Unix/Linux infrastructure, including AIX/RHEL/Debian internals, storage/filesystems, networking, authentication, backup/restore, performance tuning and cluster technologies such as HP Serviceguard, Bull ARF, Pacemaker and Corosync. Responsibilities: - Administer and support AIX, RHEL, and Debian systems (installation, configuration, patching, upgrades) - Manage high availability environments (HP Serviceguard, Pacemaker/Corosync, Bull ARF) - Perform advanced troubleshooting and performance analysis (CPU, memory, I/O, network, kernel, applications) - Implement and maintain security and hardening standards (SSH, sudo, PAM, firewalls, SELinux, auditing, access control) - Support backup and disaster recovery (mksysb, NIM, restores, DR testing) - Automate tasks using Bash/KSH/Python and Ansible - Participate in on-call rotation and DR/failover validation - Collaborate with cross-functional teams (DBA, application, storage, network, security) - Maintain technical documentation and runbooks