CrawlJobs Logo
Realign Logo Realign · IT - Administration

Senior Linux System Administrator (L3)

United States, Irving 120000.00 USD / Year · Job Posted March 21, 2026

Job offer has expired

Job Link Share

Job Description

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.

Job Responsibility

  • 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

Requirements

  • 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
Realign - All Job Offers

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Suggested Tags: Frontend Developer Secretary Talent Manager Salesforce Administrator Data Analyst
Similar Jobs for

Senior Linux System Administrator (L3)

8 matching positions

Senior / System Engineer (VEEAM/VMWare/Linux)

Make an impact with NTT DATA. Join a company that is pushing the boundaries of w...
Location
Location
Singapore , Singapore
Salary
Salary:
Not provided
nttdata.com Logo
NTT DATA
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's degree or equivalent qualification in IT/Computing (or demonstrated equivalent work experience)
  • Certifications relevant to the services provided (certifications carry additional weightage on a candidate's qualification for the role)
  • Relevant certifications include (but not limited to) - VMware certified Professional: DATA Centre Virtualization
  • VMware Certified Specialist – Cloud Provider
  • VMware Site recovery Manager: Install, Configure, Manage
  • Microsoft Certified: Azure Architect Expert
  • AWS Certified: Solutions Architect Associate
  • Veeam Certified Engineer (VMCE)
  • Rubrik Certified Systems Administrator
  • Storage HDS
Job Responsibility
Job Responsibility
  • Works independently, with general direction from the client, stakeholders, team lead, or senior manager, to perform operational tasks to resolve all escalated incidents/requests in a timely manner within the agreed SLA
  • Timely and consistent updates of tickets with resolution tasks performed
  • Proactively identifies, investigates, analyses issues and errors prior to or when they occur and log all such incidents in a timely manner
  • Captures all required and relevant information for immediate resolution
  • Provides forth level support to all escalated incidents, requests and identify the root cause of incidents and problems, respond to tickets where third line engineer teams were unable to fix the problem
  • Shares such knowledge, to resolve issues, document them, and push the knowledge down to other engineers
  • Communicates with other teams and clients for extending support
  • Acts as emergency support contact as needed, for critical client and business-impacting issues
  • Supports, tracks, and documents change implementation
  • Provides timely escalation of all tickets to management with ensuing updates, where applicable
  • Fulltime
Read More
Arrow Right

Senior Linux Technical Support Engineer

As a Senior Linux Technical Support Engineer, you will be responsible for provid...
Location
Location
India , Pune
Salary
Salary:
Not provided
everseen.ai Logo
Everseen
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Proficiency with Linux command-line tools and utilities
  • Basic knowledge of ticketing tools (Jira, ServiceNow)
  • Hands-on experience using Git for version control
  • Working knowledge of containerization tools (Docker, Podman, container)
  • Exposure to orchestration platforms (Kubernetes, OpenShift/OCP)
  • Familiarity with configuration management and automation using Ansible
  • Awareness of monitoring and visualization tools (Prometheus, Grafana)
  • Strong problem-solving and troubleshooting skills
  • Effective communication and interpersonal abilities
  • Team-oriented mindset with adaptability to shifting priorities
Job Responsibility
Job Responsibility
  • Provide first-level technical support to end-users and assist them with Linux-related issues, including user account management, password resets, and desktop support
  • Monitor the performance and health of Linux servers, identifying and addressing potential issues or anomalies
  • Diagnose/resolve and Escalate Linux system problems, such as network connectivity issues, hardware failures, and software errors
  • Assist in the installation, configuration, and maintenance of Linux-based software applications
  • Perform massive stack restart/configuration changes as requested by band using tools like Ansible Tower, AWX and Virtual desktops
  • Apply patches and updates to Linux servers as necessary to keep systems up to date and secure
  • Work closely with L2 and L3 teams to ensure issues are properly tracked and resolved
  • Fulltime
Read More
Arrow Right

Senior Software Developer, DevOps

We’re looking for a Senior DevOps Developer who can help us support the developm...
Location
Location
Canada , Vancouver
Salary
Salary:
115400.00 - 161600.00 CAD / Year
hootsuite.com Logo
Hootsuite
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • A degree in Computer Science or Engineering
  • At least 5 years of experience in an SRE, DevOps or software engineering role
  • A track record of substantial contributions to software projects with high business impact
  • Experience with mentoring, coaching, and pairing with coworkers
  • Experience writing clean code that performs well at scale
  • Understanding of SaaS software development practice
  • Experience using infrastructure-as-code tools to build and run cloud infrastructure
  • Experience with operating, building and maintaining cloud infrastructure
  • Working knowledge of Linux systems administration, including troubleshooting system-level issues, networking (L3-L7) and basic monitoring
  • Collaboration and Teamwork
Job Responsibility
Job Responsibility
  • Design and build software - tools, libraries, automation, services, and glue scripts
  • Responsible for the reliability, security, and integrity of our large, cloud-based Linux infrastructure
  • Participate in a flexible on-call rotation
  • Lead by owning project milestones, epics or features
  • Practice continuous improvement, contributing to culture, process, and direction in your team and across our department
  • Develop processes and automation to eliminate repetitive tasks
  • Design and build our infrastructure platform
  • Identify and implement new platform features
  • Research and evaluate new technologies
  • Refactor, rewrite or retire existing platform features
What we offer
What we offer
  • Health insurance including medical, dental, vision, life/disability insurances
  • Employee and Family Assistance Program
  • Group RRSP plan with a company match of up to 4% of base salary
  • 401k Plan with a company match (up to 4% of base salary)
  • Global Parental Leave (26 weeks of full and partially paid leave for permanent employees after 12 months)
  • Fulltime
Read More
Arrow Right

DevOps Manager

As a DevOps manager you will lead and grow a distributed, follow-the-sun DevOps ...
Location
Location
Romania , Timișoara
Salary
Salary:
Not provided
everseen.ai Logo
Everseen
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Proven 3+ years experience as a DevOps Manager and previous experience as a DevOps/Automation Engineer, Linux Administrator or a combination of them
  • Experience in building new teams and establishing processes and procedures
  • Basic understanding of local and distributed filesystems (ext4, xfs, NFS), storage migration, SSH tunneling, SCP, SFTP, web servers (Nginx, Apache), reverse proxying, and troubleshooting (logs, performance, connectivity)
  • Basic knowledge of Docker and Kubernetes/OpenShift, and virtualization solutions
  • Experience with Ansible/Ansible Tower (or similar tools like Salt, Puppet, Chef), Jenkins/GitLab CI/CD (or equivalents like CircleCI, TeamCity), and Infrastructure as Code (IaC) using Terraform (or alternatives like Azure Automation, CloudFormation)
  • Familiarity with Azure Cloud (or AWS, GCP), GIT for system versioning, and basic understanding of backup solutions
  • Experience in Bash scripting and Python for automation and development tasks
  • Experience with monitoring tools like Node exporter, Prometheus, Grafana, and log collection solutions (e.g.,Prometheus, fluentd, logstash)
  • Basic understanding of relational (MySQL, MariaDB) and NoSQL (Elasticsearch, MongoDB) databases, with hands-on experience writing queries
  • Hands-on experience with JSON and making Restful API calls
Job Responsibility
Job Responsibility
  • Develop team capabilities in automation, cloud and edge deployment, monitoring, troubleshooting and DevOps CI/CD pipelines
  • Drive continuous improvement initiatives and ensure alignment with business goals
  • Manage and lead the global DevOps L3 team
  • Manage the day-to-day running of the team and the projects
  • Overall responsibility for the projects that the team is working on
  • Acts as a point of escalation for the team
  • Works with senior leadership to create strategic goals for their team
  • Measures the performance of those goals
  • Shares skills, knowledge, and expertise with the team
  • Fosters a culture of collaboration and continuous learning by organizing training sessions, workshops, and knowledge-sharing sessions
  • Fulltime
Read More
Arrow Right

Senior IT Support Engineer

The Senior IT Support Engineer is the primary on-site IT contact for the US offi...
Location
Location
United States , Suwanee, Georgia
Salary
Salary:
Not provided
mujin-corp.com Logo
Mujin
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 3+ years in IT support / IT operations with hands-on responsibility for end-user computing in a business environment (on-site + remote)
  • Experience providing L1–L3 support (or L2 with demonstrated L3 escalation capability), including triage, deep troubleshooting, and clear documentation of findings and next steps
  • Proficiency supporting and troubleshooting macOS and Windows endpoints (provisioning, patching, troubleshooting, and lifecycle support)
  • Working knowledge of Linux (Debian-based preferred) for basic workstation support and user assistance (e.g., troubleshooting, connectivity, packages, permissions)
  • Experience with MDM / endpoint management (e.g., SimpleMDM, Jamf, Intune) including device enrollment, compliance, software deployment, and policy enforcement
  • Experience with Microsoft 365 (basic administration): user management, groups, licensing, and troubleshooting common Office/Teams/Outlook issues
  • Familiarity with endpoint security tooling (EDR/AV, disk encryption, patch compliance) and following security policies/standards
  • Experience using a ticketing system (e.g., Jira Service Management, ServiceNow, Zendesk, Freshservice): prioritization, escalation notes, and meeting SLAs
  • Ability to create and maintain end-user documentation (how-to guides, onboarding checklists, runbooks, FAQs)
  • Comfortable handling sensitive/confidential information with discretion and strong judgment
Job Responsibility
Job Responsibility
  • Provide L1–L3 IT support for employees: triage requests, troubleshoot complex issues, communicate clearly, and drive tickets to resolution with strong follow-through
  • Act as the US escalation owner: handle high-impact incidents, coordinate with HQ/global teams, and ensure effective handoffs across time zones
  • Own day-to-day IT helpdesk operations for the US region: intake, prioritization, SLA adherence, ticket quality, and continuous improvement of workflows and templates
  • Manage the full employee lifecycle for IT: onboarding, transfers, offboarding, including device provisioning, account setup, access changes, and recovery of assets
  • Administer identity and access management (IAM) tasks (account provisioning, group/role management, access reviews as assigned), following global standards and approval processes
  • Provision, manage, and troubleshoot endpoints and mobile devices (Windows/macOS/Linux/IOS as applicable), including imaging, patching, encryption, EDR, VPN, certificates, and secure configuration baselines
  • Administer and maintain endpoint cloud services and collaboration/SaaS tooling within scope (e.g., MDM, endpoint compliance, device inventory, software deployment), escalating platform-level changes to HQ when required
  • Partner with the US infrastructure engineer and HQ IT teams to support local office IT infrastructure (network connectivity, printers, conferencing, meeting rooms, ISP coordination) and execute approved changes
  • Lead incident and escalation management for the US site: initial containment, user communications, coordination of technical resources, post-incident documentation, and follow-up actions
  • Perform problem management: identify recurring issues, conduct root cause analysis, implement permanent fixes, and reduce ticket volume through automation and standardization
  • Fulltime
Read More
Arrow Right

Senior Hosting Engineer

WiseTech Global is a world-leading software company building software for the gl...
Location
Location
Australia , Sydney
Salary
Salary:
Not provided
blumeglobal.com Logo
Blume Global
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum of 5 years in a similar role
  • Windows Server administration (2016 and later)
  • Linux operating system administration
  • Active Directory configuration and administration
  • Linux containers skills
  • Scripting and programming skills
  • Excellent problem-solving/troubleshooting skills
  • Able to complete tasks/projects autonomously, building new solutions following industry best practices
  • Able to write concise and understandable documentation
Job Responsibility
Job Responsibility
  • Senior technical resource for the Hosting Systems Engineering team
  • Oversee and coordinate maintenance and support of production servers
  • Be the escalation point and senior technical resource for any hosting-related issues and projects
  • Troubleshoot issues within the environment as L3 Support, with a focus on suggesting improvements and executing them
  • Oversee monitoring of hosted systems and create alerts, dashboards and procedures team members can use in response to alerts
  • Write troubleshooting documentation for NOC and support team members
  • Assist in the planning, design, documentation, and implementation of various projects like CI/CD pipelines, automations to reduce manual interventions, and Kubernetes implementation
  • Contribute to technical strategy, policy and procedures
Read More
Arrow Right
New

Casual Front Desk Agent

Location
Location
United States , Hanalei Bay
Salary
Salary:
30.00 USD / Hour
Starwood Hotels
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum of 1 year of similar work experience
  • Ability to speak a secondary language is a plus
  • Experience in guest or customer service
  • Team player
  • Hard worker
  • Multi-tasker
  • Detail oriented
  • Flexible and willing to meet the demands of a 24-hour operation
Job Responsibility
Job Responsibility
  • Ensure that every guest's experience is relaxing and effortless—at arrival and departure and all through the stay
  • Parttime
Read More
Arrow Right
New

Chef Tournant

In this role, you’ll oversee an assigned section of the kitchen, cooking and pre...
Location
Location
United States , New York City
Salary
Salary:
27.30 USD / Hour
Starwood Hotels
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Passionate about food and a minimum of 2 years of similar work experience
  • A post-secondary diploma or degree would be a plus
  • Advanced knowledgeable of culinary operations, a strong leader and a proven track record in guest and team member engagement and financial performance
  • Excels at communication, both verbal and written
  • Is flexible and willing to meet the demands of a 24-hour operation
Job Responsibility
Job Responsibility
  • Oversee an assigned section of the kitchen, cooking and preparing each dish to perfection
  • Partner with our talented chefs to make memorable dishes for our guests to remember
  • Fulltime
Read More
Arrow Right