Job ID: JOB_ID_2123
Position Summary: Senior L3 Linux Administrator
Fixity Technologies is looking for a hands-on Senior L3 Linux System Administrator to lead the stability, availability, and performance of our large-scale enterprise Linux environments. This is a high-impact role requiring deep technical expertise in RHEL, Oracle Linux, and high-availability clustering solutions. As an L3 lead, you will be the final point of escalation for complex infrastructure issues and will drive the technical roadmap for our server environments in Irving, TX, with remote flexibility.
Core Technical Responsibilities
- Advanced Linux Administration: Manage and troubleshoot RHEL, Oracle Linux, CentOS, and SUSE. Resolve critical kernel panics, boot failures, and resource contention issues across thousands of nodes.
- High Availability with Veritas: Act as the subject matter expert for Veritas Cluster Server (VCS/InfoScale). Configure multi-node clusters, manage service groups, and lead disaster recovery (DR) drills.
- Storage and File Systems: Manage SAN/NAS integration, LUN provisioning, and multipathing. Expert-level management of VxVM, VxFS, XFS, and NFS exports.
- Automation and DevOps: Improve Business-As-Usual (BAU) operations by developing automation scripts in Bash and Python. Implement configuration management using Ansible to ensure environment consistency.
- Data Center Coordination: Partner with physical data center teams for hardware lifecycle management, including racking, cabling, and troubleshooting hardware faults (CPU, RAID, NIC) with vendors like Dell, HP, and Cisco.
- Security Hardening: Audit and implement security benchmarks (CIS), manage SELinux policies, and oversee system-wide patching strategies with robust rollback plans.
Incident and Problem Management
- Lead technical recovery efforts during P1/P2 incidents, driving bridge calls and coordinating between cross-functional teams.
- Perform comprehensive Root Cause Analysis (RCA) and implement permanent corrective actions to prevent recurrence.
- Maintain high-quality documentation, including SOPs, Runbooks, and Method of Procedure (MOP) documents.
Required Experience
- 8-12+ years of enterprise-level Linux system administration experience.
- Proven expertise in Veritas Cluster Server (VCS) and Veritas Volume Manager (VxVM).
- Strong background in networking (TCP/IP, VLANs, Bonding) and host-level security.
- Experience with VMware/KVM and cloud infrastructure (AWS/Azure).
- Excellent communication skills for leading incident response and mentoring junior staff.
Special Requirements
Visa: USC or GC only. Role involves L3 escalation and on-call rotation.
Compensation & Location
Salary: $145,000 – $190,000 per year (Estimated)
Location: Irving, TX
Recruiter / Company – Contact Information
Recruiter / Employer: Fixity Technologies
Email: sai.p@fixitytech.com
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