Senior AIX UNIX Administrator

We are looking for a highly skilled Senior AIX & Linux System Specialist to join our dynamic IT infrastructure team. The ideal candidate will have strong hands-on experience in managing AIX, Linux (Red Hat/Ubuntu/CentOS), and OpenShift environments with a strong foundation in system administration, automation, and performance tuning.

Responsibilities

1. AIX (IBM's UNIX Operating System)
   • AIX System Administration: Installation, configuration, patching, and upgrading AIX systems.
   • LVM (Logical Volume Management): Volume management, creating logical volumes, file systems, and managing storage.
   • Networking: Configuring network interfaces, TCP/IP, DNS, routing, and troubleshooting network connectivity.
   • Security: User authentication, LDAP, Kerberos, and implementing security best practices.
   • Performance Tuning: CPU, memory, disk, and network performance tuning and analysis.
   • Automation and Scripting: Using shell scripting (Bash, Korn Shell) to automate tasks.
   • Backup & Recovery: Implementing backup solutions and disaster recovery planning.
   • System Monitoring and Diagnostics: Using tools like NMON, topas, vmstat for performance monitoring.
2. Linux System Administration
   • Managing Red Hat, Ubuntu, CentOS, etc., through command-line tools and graphical utilities.
   • Package Management: RPM, DNF, YUM for installing and maintaining packages.
   • File System Management: Ext4, XFS, ZFS; disk partitioning, mounting, and file system permissions.
   • Networking: Configuring IP addresses, routing, VPNs, firewall settings, and troubleshooting using tools like netstat, iptables, and tcpdump.
   • Security: Implementing SELinux, firewall (firewalld), and auditd; SSH configuration, sudo policies.
   • Virtualization: Proficiency with tools like KVM, Xen, and Docker containers.
   • Automation: Bash scripting, Ansible, and automation frameworks for continuous integration and deployment.
   • System Monitoring: Using tools like Nagios, Prometheus, and Grafana for monitoring and alerting.
   • Latest Red Hat Certified System Administration (RHCSA/RHCE): Certification and deep knowledge in managing Red Hat-based distributions.
   • Red Hat Satellite: Managing systems with Red Hat Satellite for centralized management.
   • SELinux Configuration: Enforcing security policies using SELinux in Red Hat environments.
   • Configuration Management: Using Ansible, Puppet, or Chef for system automation and configuration management.
   • High Availability: Configuring clustering solutions such as Red Hat Cluster Suite and Pacemaker.
3. Redhat OpenShift
   • Design, deploy, and manage Red Hat OpenShift Container Platform clusters.
   • Configure and optimize OpenShift networking, storage, and security.
   • Implement high availability (HA) and disaster recovery (DR) solutions for OpenShift.
   • Develop, maintain, and optimize Ansible playbooks and roles for infrastructure automation.
   • Automate provisioning, configuration, and management of servers, networks, and applications.

Desired Candidate Profile

• 8+ years of IT infrastructure and operations experience
• 5+ years of AIX and Linux system administration
• 3+ years with Red Hat OpenShift and Ansible
• Proven expertise in automation, performance tuning, and security
• Red Hat Certified Engineer (RHCE) or Specialist in Linux
• IBM Certified System Administrator – AIX v7
• Red Hat Certified Specialist – OpenShift & Ansible
• Kubernetes Certifications (CKA/Docker Certified Associate)