Job Description Overview This role is responsible for managing and optimizing the company’s Linux environments, primarily RHEL and Oracle Linux. It focuses on core activities such as server administration, security, and performance, with an emphasis on supporting production of Linux infrastructure. The selected candidate will work with the Engineering team to drive architecture and design improvements. Several of the responsibilities outlined below reflect the organization's target-state vision, which the successful candidate will help define and implement Your Role System Installation and Configuration: Deploy and configure Linux-based operating systems (RHEL, Oracle Linux) on servers including setting up network parameters, storage, and security settings. User Management: Administer centralized authentication and identity management platforms such as Red Hat IdM. Create and maintain user groups, role-based access controls (RBAC), and host-based access controls. Configure and manage sudo policies, privileged command delegation, and privileged access monitoring. Perform regular access reviews and recertification activities to identify excessive permissions and inactive accounts. Patching Management: Administer and maintain software repositories, content views, and package management infrastructure using Red Hat Satellite. Deploy software updates, patches, hotfixes, and security remediations via Ansible Automation Platform. Ensure all servers remain compliant with organizational security, vulnerability management, and software lifecycle policies. Troubleshoot package installation, repository connectivity, dependency conflicts, and software update failures. Generate compliance and patch status reports for management, audit, and security teams. Server Maintenance: Maintain the health, stability, and security of Linux server environments, primarily Red Hat Enterprise Linux (RHEL) and Oracle Linux (OEL). Register and manage Linux servers within Red Hat Satellite. Apply and maintain security hardening standards, ensuring compliance with organizational security requirements. Maintain server inventories, configuration baselines, and lifecycle documentation. Troubleshoot and resolve server-related incidents, including hardware, operating system, and storage. Automate routine maintenance activities using Ansible, shell scripting, and enterprise automation platforms. Monitoring and Performance Optimization: Monitor server health, system performance, resource utilization, and service availability across physical and virtual Linux environments. Investigate, troubleshoot, and resolve performance bottlenecks affecting CPU, memory, storage, network, and application services. Perform regular system health checks and optimisation activities to maximize uptime, efficiency, and operational stability. Analyse system metrics, logs, and audit data to identify recurring incidents, root causes, and opportunities for automation and improvement. A working knowledge of SCOM monitoring tool and ServiceNow is an asset. Troubleshooting and Issue Resolution: Diagnose, investigate, and resolve complex Linux operating system, network, storage, and infrastructure issues across enterprise environments. Perform root cause analysis (RCA) for incidents and recurring problems, implementing permanent corrective actions to prevent reoccurrence. Lead the resolution of critical production incidents, ensuring minimal service disruption and adherence to agreed service levels. Troubleshoot issues related to RHEL, virtualization platforms, identity management,storage, networking, backup solutions, and automation tools. Develop and maintain troubleshooting procedures, knowledge articles, and technical documentation to improve operational effectiveness. Conduct post-incident reviews and recommend service improvements, configuration changes, and preventative maintenance activities. Backup and Disaster Recovery: manage system backup to ensure data integrity and contribute to disaster recovery plan activation or testing. Shell Scripting and Automation: Code and maintain shell scripts and automation tools to streamline repetitive tasks and improve system efficiency. Automate routine administrative tasks using shell scripting / Ansible. Knowledge of Ansible, playbook and YAML is desired. Virtualization: Manage virtual machines (e.g., VMware, Nutanix) System Security Auditing and Compliance: Conduct security audits and ensure Linux systems comply with relevant security standards and policies. Continuous Learning: Stay up to date with the latest advancements in Linux technologies and acquire new skills to enhance system administration capabilities. Collaboration: Coordinate with other IT teams, developers, and stakeholders to support various projects and ensure smooth integration of Linux systems with other components. Documentation: Maintain a comprehensive documentation of system configurations, procedures, and troubleshooting steps for future reference. Availability: Be available on call as per the on-call roster including on weekends to implement planned changes OR resolve production outages. Extend shift if required to resolve production outages. Continuous service improvements: Initiate, own and implement service improvements including automation that can improve processes, reduce outages, incidents, make environment more stable, reduce effort required to support, minimize/mitigate risks, improve customer satisfaction etc. The above responsibilities may be revised as per the business requirement. About You Minimum 8 years’ experience in supporting production Linux server infrastructure. Minimum 3 years’ experience in Level 3 role supporting more than 300 Linux servers. Bachelor’s degree in computer science, Information Technology, or equivalent combination of education and experience in a related field Rewards & Benefits Explore the rewards and benefits that help you thrive – at every stage of your life and your career. This includes: · Comprehensive life insurance coverage. · Premium medical insurance for you and your dependents. · Generous annual leave balance. · Flexible and hybrid work solutions. · Remote work opportunities outside of country. · Company gratuity scheme. · Discretionary bonus program. · Relocation assistance. · Employee Wellbeing Program: 24/7 access to specialists in finance, legal matters, family care, personal health, fitness, and nutrition. Seize every opportunity to sharpen your skills, expand your expertise, and be recognized for the impact you make. About AtkinsRéalis We're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people. Find out more. Worker Type Employee Job Type Regular At AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences. Created by the integration of long-standing organizations dating back to 1911, AtkinsRéalis is a world-class engineering services and nuclear company dedicated to engineering a better future for our planet and its people. We create sustainable solutions that connect people, data and technology to transform the world's infrastructure and energy systems. We deploy global capabilities locally to our clients and deliver unique end-to-end services across the whole life cycle of an asset including consulting, advisory & environmental services, intelligent networks & cybersecurity, design & engineering, procurement, project & construction management, operations & maintenance, decommissioning and capital. The breadth and depth of our capabilities are delivered to clients in strategic sectors such as Engineering Services, Nuclear and Capital. News and information are available at Atkinsrealis or follow us on LinkedIn.

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4 Nov, 2026

Slihrms

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CA.ON.Pickering Plant 1675 Montgomery Park Road, Canada

Salary not listed

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