Systems Administrator III (Linux Admin - L3)

Job Description

Profile: System Administrator III

Domain: Linux

Level: 3

Role: As a System Administrator III, you will be a key pillar in our Data Center Operations team. You aren’t just maintaining servers; you are ensuring the backbone of our business is resilient, scalable, and secure. You will lead the installation, configuration, and optimization of our Linux environment (RHEL/OL) while driving automation initiatives and resolving complex architectural challenges.

Key Responsibilities Required Qualifications & Skills:

• Enterprise Linux Management
• System Lifecycle: Lead the installation, configuration, and maintenance of Linux distributions including RHEL (6x, 7x, 8x) and Oracle Linux (6x, 7x).
• Performance Engineering: Conduct deep-dive performance tuning and workload optimization to ensure maximum uptime and efficiency.
• Storage & Filesystems: Administer LVM, Disk/Volume groups, NFS, and automount; expertly troubleshoot complex filesystem and mounting issues.
• Kernel Diagnostics: Configure and analyze KDUMP/kernel dumps to perform root-cause analysis (RCA) on system crashes.
• Automation & Modern Infrastructure
• Infrastructure as Code: Drive operational efficiency by using Ansible, Puppet, or equivalent tools for configuration management and deployment.
• Virtualization: Manage and build customized VM templates using VMware vSphere to support a dynamic virtual environment.
• Hybrid Cloud: Support and manage integrated cloud services including AWS (EC2, S3, VPC, ELB, and Route 53).
• Security, Networking & Compliance
• Vulnerability Management: Proactively remediate and mitigate security vulnerabilities through structured change management.
• Network Administration: Manage IP networking, static routing, and core protocols (FTP, SSH, SMTP, DNS, DHCP).
• Access & Identity: Handle client-side LDAP configurations and troubleshoot user authentication issues.
• Security Guarding: Maintain and configure host-based firewalls (IPTABLES/Firewalld).
• Operational Excellence
• ITIL Leadership: Act as a technical lead for Incident, Change, and Problem Management, providing detailed RCAs for P1/Critical tickets.
• Hardware Ownership: Coordinate with vendors and manage physical infrastructure (HP ProLiant, Dell PowerEdge) and SAN/NAS storage connectivity.
• Patching & Monitoring: Oversee enterprise-wide OS patching cycles and leverage SNMP-based tools for proactive system monitoring.
• Experience: 6+ years of relevant technical experience in a corporate Data Center environment.
• Linux Mastery: Expert-level knowledge of Red Hat Satellite Server, RHN, and subscription management.
• Automation Mindset: Proven experience moving from manual tasks to automated workflows (Ansible/Puppet).
• The "Plus" Factor: Knowledge of secondary Unix flavors (Solaris, HP-UX) and SAN/NAS storage concepts.
• Soft Skills: Exceptional documentation skills and a "continuous improvement" mindset. You should be a self-starter who can lead through ambiguity.
• Certification: RHCE (Red Hat Certified Engineer) is highly preferred.

Equal Employment Opportunity: Compucom is committed to providing equal employment opportunities in all employment practices. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability, protected veteran status, or any other characteristic protected by law.