Senior Linux System Administrator

Job Title: Senior Linux System Administrator

Location: Chennai - Siruseri Sipcot IT Park (Work From Office)

About Us

The Opportunity

We are looking for a highly skilled and experienced *Senior Linux System Administrator with 6-8 years of dedicated experience to join our core infrastructure team. In this pivotal role, you will be responsible for the advanced deployment, configuration, maintenance, and optimization of our diverse *nix server environments. You will play a crucial part in ensuring the security, stability, scalability, and high availability ofur systems, leveraging deep technical expertise, automation, and proactive monitoring.

Roles and Responsibilities

• System Lifecycle Management:

Lead the deployment, configuration, and advanced maintenance of enterprise-grade Linux

servers (e.g., Red Hat Enterprise Linux (RHEL), CentOS, Ubuntu, SUSE, and other *nix

derivatives as applicable).

Manage comprehensive system updates, patching strategies, and major OS upgrades to

ensure stability, security, and compliance.

Proactively optimize system performance through advanced tuning, efficient resource

allocation, and continuous monitoring.

• Storage & High Availability:

Architect, implement, and manage complex storage solutions, including SAN, NAS, and

LVM-based setups, ensuring data integrity and accessibility.

Ensure robust system scalability and high availability using advanced clustering technologies

(e.g., Pacemaker, Corosync, HAProxy) and load balancing solutions.

• Security & Compliance:

Implement and maintain stringent security best practices, including advanced firewall rules

(iptables/firewalld), SELinux, AppArmor, and vulnerability remediation.

Perform regular vulnerability assessments, penetration test remediation, and apply

necessary security patches.

Design and manage Identity & Access Management (IAM), Role-Based Access Control

(RBAC), and adhere to least privilege principles across *nix environments.

Ensure strict compliance with industry security standards (ISO 27001, NIST, CIS

benchmarks) and internal security policies.

• Monitoring, Troubleshooting & Automation:

Diagnose and resolve complex system, network, and performance issues across distributed

*nix infrastructures.

Implement and optimize system health monitoring using tools like Nagios, Zabbix,

Prometheus, and centralized logging solutions (e.g., ELK Stack, Splunk).

Drive automation initiatives using scripting languages (Python, Bash, Perl) and

configuration management tools (Ansible, Puppet, Chef, SaltStack) for server provisioning,

configuration management, and operational tasks.

• Leadership & Documentation:

Guide, mentor, and technically lead junior Linux / Middleware administrators, fostering their

growth and expertise.

Lead technical projects, including significant server migrations, infrastructure upgrades, and

cloud adoption initiatives.

Develop and maintain comprehensive documentation of best practices, operational

procedures, and troubleshooting guides.

Skills Requirements

• Operating Systems:

Expert-level proficiency in administering and troubleshooting Linux operating

systems (RHEL, CentOS, Ubuntu, SUSE).

Familiarity with other *nix variants (e.g., Solaris, FreeBSD) is a plus.

• Networking:

Solid understanding and hands-on experience with advanced networking concepts

and protocols (TCP/IP, DNS, DHCP, VPNs, routing protocols like OSPF/BGP, network

bonding/teaming).

Expertise in configuring and troubleshooting firewalls (iptables/firewall).

• Storage Management:

In-depth knowledge of SAN, NAS, and LVM (Logical Volume Manager).

Experience with various file systems (XFS, ext4, Btrfs), NFS, and iSCSI.

• Security:

Expertise in Linux security hardening, including SELinux, AppArmor, user/group

management, SSH security.

Experience with vulnerability assessment tools and patch management systems.

Strong understanding of Identity & Access Management (IAM) and RBAC principles within

a Linux context.

• Automation & Scripting:

Demonstrable expertise in scripting languages such as Python, Bash, and Perl.

Extensive experience with configuration management tools like Ansible, Puppet, Chef,

or SaltStack for large-scale automation.

• Monitoring & Logging:

Proficiency in deploying and managing monitoring solutions such as Nagios, Zabbix, or

Prometheus.

Experience with centralized logging platforms like ELK Stack (Elasticsearch, Logstash,

Kibana) or Splunk.

• High Availability & Virtualization:

Hands-on experience with Linux clustering technologies (e.g., Pacemaker, Corosync).

Experience with virtualization platforms such as VMware ESXi, KVM, or Xen.

Familiarity with containerization concepts (Docker, basic Kubernetes interaction from an

OS perspective) is a plus.

• Cloud Platforms:

*Demonstrable experience administering nix systems in cloud environments (AWS,

Microsoft Azure, or Google Cloud Platform), including managing cloud-native services

relevant to system administration.

• Problem Solving:

Exceptional diagnostic and problem-solving skills for complex, multi-component system and

network issues.

• Communication:

Excellent communication and collaboration skills, with the ability to effectively mentor,

document, and interact with cross-functional teams.

Candidate Requirements

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 6-8 years of progressive experience as a Linux System Administrator, demonstrating increasing

levels of responsibility and technical depth.

• Relevant industry certifications (e.g., RHCE, Linux Professional Institute LPIC-2/LPIC-3,

CompTIA Linux+) are highly desired.

• Proven experience in leading technical projects and mentoring junior team members.
• Ability to work in an on-call capacity to handle incidents and ensure system uptime.