Senior Linux Infrastructure Operations Engineer - Linux P3 production

AtkinsRéalis Group; Bengaluru; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

AtkinsRéalis Group in Bengaluru, India, seeks an experienced Senior Linux Administrator to manage and optimize Linux environments (RHEL and Oracle Linux). You will handle server installation, security, patching, and performance tuning to support production workloads.

You’ll collaborate with the Engineering team to drive architecture improvements, implement automation, and maintain comprehensive documentation. On-call rotations and shift flexibility are part of the role.

Qualifications

• 8+ years of experience in supporting production Linux server infrastructure.
• 3+ years in Level 3 role supporting 300+ Linux servers.
• Bachelor's degree in computer science, IT, or equivalent combination of education and experience.

Responsibilities

• System installation and configuration of RHEL/Oracle Linux on servers.
• Manage authentication with Red Hat IdM and implement RBAC and sudo policies.
• Maintain and patch Linux environments using Red Hat Satellite and Ansible Automation Platform.
• Automate routine maintenance with shell scripts/Ansible.
• Monitor performance and optimize resources across physical and virtual Linux environments.
• Lead incident resolution and perform root-cause analysis for complex issues.
• Maintain security hardening, inventories, baselines, and lifecycle docs.
• Collaborate with engineering teams to align Linux infra with architecture goals.

Skills

Linux administration

Security

Performance tuning

RBAC

Scripting

Education

Bachelor's degree in computer science/IT

Tools

Red Hat Satellite

Red Hat IdM

Ansible

SCOM

ServiceNow

VMware

Nutanix

Job description

Job Summary

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.

Responsibilities

• 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.

Requirements

• 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

Worker Type

Employee

Job Type

Regular