Senior Linux System Administrator (L3)
Stanley David and Associates
Dice Job Match Score™
👾 Reticulating splines...
Job Details
Skills
- Veritas Cluster Server
- Veritas
- Linux Administration
- RHEL
Summary
- Job Title: Senior Linux System Administrator (L3)
- Location: Irving, TX
- Job Type: Fulltime
Seeking a hands-on L3 Linux Administrator to own stability, availability, and performance across large-scale Linux environments. The role demands deep troubleshooting skills, strong exposure to Veritas Clustering (VCS), SAN/NAS storage, and close coordination with data center teams for hardware incidents. The ideal candidate will work independently, lead incident resolution, and improve BAU operations through automation and best practices.
- Administer and troubleshoot RHEL, Oracle Linux, CentOS, SUSE in production.
- Diagnose complex OS issues: kernel panics, boot/GRUB failures, filesystem corruption, resource contention (CPU/RAM/I/O/Network), SELinux/AppArmor denials.
- Patch and upgrade OS at scale; manage package repositories and kernel updates with rollback strategies.
- Implement and audit security hardening (firewalld/iptables, CIS benchmarks, PAM, sudo, SSH, auditd).
- Manage system services (systemd), cron/timers, users/groups, sudoers, and system-wide configuration.
- Install, configure, and administer VCS for HA/DR across multi-node clusters.
- Create/maintain service groups, resources, dependency trees; configure LLT/GAB, I/O fencing, and quorum.
- Integrate VxVM/VxFS (disk groups, volumes, file systems) with application failover.
- Conduct DR drills, failover testing, and root cause analysis for cluster events.
- Liaise with storage teams for LUN provisioning, zoning, masking; validate multipathing (DM Multipath/PowerPath).
- Build and maintain filesystems (ext4/xfs/VxFS), mount policies, fstab and autofs.
- Manage NFS/CIFS/SMB exports/mounts, permissions, quotas, and locking issues.
- Troubleshoot pathing, latency, and I/O bottlenecks using OS, HBA, and array-side telemetry.
- Coordinate with DC teams for racking/stacking, cabling, console access, and physical triage.
- Diagnose hardware faults (CPU, memory, NIC/HBA, disks/RAID/SSD, backplane, PSU, fans) and firmware/BIOS alignment.
- Raise and track OEM tickets (Dell/HP/IBM/Cisco), manage RMA, and oversee replacements and post-fix validation.
- Act as L3 escalation for P1/P2 incidents; drive bridge calls and lead technical recovery.
- Perform deep-dive log analysis (journald, syslog, dmesg, audit logs, application logs).
- Create/run SOPs/runbooks, maintain KB articles, and implement problem management (RCA, corrective actions).
- Support on-call rotation and scheduled maintenance windows (change management, CAB, MOPs).
- Troubleshoot TCP/IP, routing, VLANs/bonding/teaming, MTU, host firewalls, DNS/DHCP, NTP/Chrony.
- Collaborate with network teams on L2/L3 connectivity, load balancers, and firewall rules.
- 8–12+ years in enterprise Linux system administration with proven L3 ownership.
- Strong hands-on with VCS (Veritas Cluster Server), VxVM, VxFS, and HA/DR patterns.
- Solid SAN/NAS experience: LUNs, zoning, multipath, NFS/SMB.
- Demonstrated success working independently and leading during critical incidents.
- Advanced troubleshooting: kernel, performance, storage, and cluster-level failures.
- Scripting proficiency (Bash; Python preferred). Familiar with Ansible.
- Familiarity with VMware/KVM and basic cloud (AWS/Azure/Linux in cloud) concepts.
- Strong documentation discipline (SOPs, MOPs, RCAs) and ITIL-aligned processes.Looking forward to hearing from you.
- Dice Id: 91097129
- Position Id: 8911603
- Posted 11 hours ago
Company Info
We strive to add value and work as true partner with our clients
Stanley David And Associates is a recruitment specialist in the area of IT and Engineering and we stay firmly in our area of expertise, doing what we love.
We know the players and the companies and invest a lot of time getting to know candidates and clients in equal measure. This ensures a swift, cost effective and perfect placement whether it s permanent or interim.
In addition we have a reputation for having the best understanding of the market landscape, for sourcing great candidates
-We have a Global Footprint with offices in 3 countries USA, UK and India.
-SDNA Global have built up an incredible reputation within the IT strategic hiring.
-We work with Tier1 and Tier 2 IT Outsourcing companies for Leadership hiring needs in UK, Europe, USA and Indian geos.
-Each SDNA member has over 5 years of experience in Talent Acquisition
-We have successfully closed roles in countries UK, USA, Germany, Sweden, Dubai, France, Netherlands, Switzerland, Austria, Hungry, Spain, Italy, Norway, Denmark, Nigeria and South Africa
-Telecom, Media and Hi-tech
-Health care and Life Sciences
-Energy and Utilities
-CPG, Retail and Transport
-Banking and Financial Services
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