Senior Linux/Unix System Administrator

We are seeking an experienced Senior Linux/Unix System Administrator with 6 8+ years of enterprise infrastructure experience to support and maintain mission-critical Linux environments. The ideal candidate will have strong expertise in Red Hat Enterprise Linux (RHEL), Oracle Linux, Ansible automation, Linux clustering, storage administration, and scripting. This role requires hands-on system administration, patching, automation, troubleshooting, and production support in a highly available enterprise environment.

Required Experience

• 6 8+ years of Linux/Unix System Administration experience in enterprise environments.
• Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent experience).
• Experience supporting production infrastructure with minimal supervision.
• Ability to participate in a 24x7 on-call rotation and support after-hours maintenance.
• Former Exelon contractors must be eligible for a new 12-month assignment and be in good standing.

Required Technical Skills

• Expert administration of:
  • Red Hat Enterprise Linux (RHEL 6/7/8/9)
  • Oracle Linux
  • Unix environments
• Experience with:
  • Ansible (Playbooks, build automation, patch automation)
  • Linux scripting (Bash/Bourne Shell, Python, Perl, or Java)
  • Red Hat PCS Clustering
  • Storage administration (ZFS, LVM, Veritas)
  • VMware vSphere virtualization
  • Server patching, upgrades, backups, and performance tuning
  • Production release management and change management
  • Server monitoring, troubleshooting, and root cause analysis

Preferred Skills

• Solaris administration
• Oracle Clusterware
• Veritas InfoScale
• Oracle Exadata
• Oracle Cloud Infrastructure (OCI)
• Microsoft Azure administration
• Zerto
• SAN, NAS, RAID, Backup technologies
• VMware administration certifications
• Red Hat, Azure, Oracle Cloud, or VMware certifications

Key Responsibilities

• Administer and maintain enterprise Linux servers (RHEL, Oracle Linux).
• Install, configure, patch, upgrade, and troubleshoot operating systems and server hardware.
• Build and automate server provisioning using Ansible and scripting.
• Configure and maintain Linux clustering and high-availability solutions.
• Manage storage technologies including ZFS, LVM, and Veritas.
• Support VMware virtual infrastructure and production Linux environments.
• Monitor system health, performance, backups, and security compliance.
• Plan and implement security patching and operating system upgrades.
• Maintain accurate server documentation and configuration records.
• Support production releases, infrastructure changes, and disaster recovery activities.
• Rack and stack servers when required.
• Collaborate with infrastructure, application, database, and network teams to resolve complex technical issues.
• Drive automation initiatives to improve operational efficiency.
• Participate in 24x7 on-call support and scheduled maintenance windows.

Desired Soft Skills

• Strong troubleshooting and analytical skills.
• Ability to lead technical discussions and resolve complex production issues.
• Self-motivated with minimal supervision.
• Excellent communication and documentation skills.
• Experience working in enterprise IT environments with high availability requirements.
• Strong understanding of change management and operational best practices.