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L3 Linux Administrator
- Toronto, ON, Canada
Contract
This opening has closed.
The original listing is kept below for reference.
Job details
- Job type
- Contract
- Closing date
- Posting language
- English
- Posted
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Search current openingsOriginal job description
Archived listing. The details below describe a past opening.
We are seeking an experienced L3 Linux Administrator with strong expertise in Red Hat Linux, IBM WebSphere Application Server (WAS), Ansible Automation, and Configuration as Code (CaC). The successful candidate will be responsible for maintaining mission-critical production environments, supporting enterprise middleware platforms, driving infrastructure automation, and ensuring system availability, stability, security, and performance.
The role requires deep technical expertise in Linux administration, WebSphere middleware, infrastructure automation, troubleshooting, and production support within large enterprise environments.
Key Responsibilities
Administer and support Red Hat Enterprise Linux (RHEL) servers across Production, DR, and Non-Production environments.
Perform OS installation, patching, upgrades, security hardening, and performance tuning.
Troubleshoot Linux operating system, storage, file system, networking, and security-related issues.
Monitor system health, capacity, and performance.
Collaborate with developers, operations, and security teams to design and implement robust, secure, and scalable infrastructure and systems Automate the deployment, scaling, and observability of applications and services Continuously improve and optimize the performance, availability, and security of our systems Work closely with the SRE team to design and implement deployment pipelines, incident response and recovery plans Continuously improve and optimize the performance, availability, and security of our systems Install, configure, administer, and support IBM WebSphere Application Server (WAS/WAS ND).
Manage application deployments, clustering, node synchronization, and JVM tuning.
Support IBM HTTP Server (IHS), Plugin configurations, SSL certificate management, and middleware integrations.
Perform root cause analysis and troubleshooting for WebSphere production incidents.
Support application performance tuning and platform optimization.
Develop and maintain Ansible Playbooks, Roles, and Automation Frameworks.
Implement and support Configuration as Code (CaC) principles to standardize environment configurations.
Automate server provisioning, patching, middleware deployments, compliance checks, and configuration management.
Ensure configuration consistency across environments through Git-based workflows and automation.
Collaborate with development and infrastructure teams to improve deployment efficiency
More about this job
Responsibilities
Administer and support Red Hat Linux servers and IBM WebSphere middleware across production, disaster recovery, and non-production environments, including deployments, security, performance, and incident troubleshooting. Build Ansible automation and Configuration as Code workflows to standardize provisioning, patching, compliance, and deployments while improving system availability, stability, and security.
Requirements
The role calls for deep expertise in Red Hat Linux administration, IBM WebSphere, Ansible, and Configuration as Code, along with experience supporting large enterprise production environments. Candidates should be able to troubleshoot complex infrastructure and middleware issues, tune performance, automate operations, and collaborate with development, operations, security, and SRE teams.
Skills
- Red Hat Enterprise Linux
- Linux Administration
- IBM WebSphere Application Server
- WebSphere Network Deployment
- Ansible Automation
- Configuration as Code
- IBM HTTP Server
- Middleware Administration
- JVM Tuning
- SSL Certificate Management
- Infrastructure Automation
- Server Provisioning
- Patching and Upgrades
- Troubleshooting
- Performance Tuning
- Production Support
Visa sponsorship
Not detected in the job text
Categories
- Technology
- Software
- Engineering
Keywords
- Red Hat Enterprise Linux
- Linux Administration
- IBM WebSphere Application Server
- WebSphere Network Deployment
- Ansible
- Configuration as Code
- IBM HTTP Server
- Middleware
- Production Environments
- Disaster Recovery
- Operating System Installation
- Patching
- Upgrades
- Security Hardening
- Performance Tuning
- Storage
- File Systems
- Networking
- Monitoring
- Capacity Management
- Application Deployment
- Clustering
- Node Synchronization
- JVM Tuning
- SSL Certificates
- Root Cause Analysis
- Automation Frameworks
- Git-Based Workflows
- Compliance Checks
- Site Reliability Engineering