Senior Systems Engineer

Job Description – Linux L3 System Administrator

Job Summary

The Linux L3 System Administrator is responsible for advanced architecture, administration, troubleshooting, and optimization of large-scale Linux environments. This role provides technical leadership, handles complex incidents and escalations, drives automation and standardization, and ensures platform stability, security, and performance across on‑premise and cloud infrastructures.

Key Responsibilities

Provide L3-level support for Linux OS (RHEL, Oracle Linux, CentOS, Rocky Linux)

Act as final technical escalation point for complex OS, performance, and availability issues

Lead major incident troubleshooting, perform deep-dive analysis, and deliver Root Cause Analysis (RCA)

Design, build, and maintain highly available and scalable Linux platforms

Own OS builds, upgrades, kernel updates, and lifecycle management

Architect and support LVM, multipathing (DM‑Multipath, PowerPath), and enterprise storage integrations

Implement and maintain automation using Ansible, shell scripting, Python

Provide advanced support for VMware and physical server infrastructures

Drive security hardening, vulnerability remediation, and audit compliance

Support cloud platforms (Azure, AWS) – OS provisioning, optimization, and troubleshooting

Collaborate with application, database, network, and security teams on solution design

Mentor L1/L2 engineers and review SOPs, standards, and best practices

Participate in 24x7 on-call rotations and planned maintenance activities

Required Skills & Experience

8–10+ years of enterprise Linux system administration experience

Deep expertise in RHEL/Oracle Linux

Strong experience with:

LVM, multipathing, SAN/NAS storage

System performance tuning and analysis

Advanced troubleshooting in production

Hands-on experience with Ansible automation

Strong shell scripting skills (Bash); Python desirable

Experience with ServiceNow or equivalent ITSM tools

Strong understanding of networking concepts (bonding, VLANs, routing basics)

Experience supporting 24x7 mission‑critical environments

Preferred Qualifications

RHCE / RHCA or equivalent certifications

Experience with container platforms (Docker/Kubernetes) – OS perspective

Exposure to cloud-native Linux deployments

Experience in ITIL-aligned operations

Professional Attributes

Strong ownership mindset and decision‑making capabilities

Ability to handle high‑pressure, business‑critical incidents

Excellent communication and stakeholder management skills

Passion for automation, standardization, and continuous improvement

"We are an equal opportunity employer. All qualified applicants will be considered for employment without regard to caste, colour, creed, religion, gender, gender identity, sexual orientation, age, disability, HIV status, or any other status protected by law. Candidates with disabilities who require accommodations during the recruitment process are encouraged to contact our Talent Acquisition team to place a request."