Linux and Windows System Administrator – Banking | Nair Systems | Qatar

Nair Systems LLC; Qatar; On-site; QAR 180,000 - 240,000; Full time

Job summary

Nair Systems LLC in Qatar seeks an experienced Linux and Windows System Administrator in the banking domain to install, configure, secure, and maintain enterprise server environments on a full-time onsite basis.

You will monitor performance, apply security patches, manage AD and access controls, coordinate with DB, network, and security teams, and ensure high availability for mission-critical financial applications in a regulated banking context.

Qualifications

• 4+ years in enterprise Linux and Windows administration.
• Experience supporting IT infrastructure in banking or financial services.
• Proficient in Linux distros (RHEL/CentOS/Ubuntu/Rocky) and Windows Server.
• Strong skills in AD, access controls, and security hardening.
• Experience with patch management and kernel upgrades.

Responsibilities

• Install, configure, secure, and maintain Linux and Windows servers.
• Monitor performance, capacity, health, and availability of services.
• Manage user accounts, permissions, and privileged access control.
• Apply patching, OS upgrades, and security updates.
• Troubleshoot OS-level issues and outages; maintain logs and audits.
• Coordinate with DBAs, network engineers, and security teams.
• Maintain documentation, baselines, and SOPs.

Skills

Linux system administration

Windows system administration

Banking IT operations

Active Directory

Security hardening

Kernel patching

Cross-functional communication

Tools

VMware vSphere

Hyper-V

Nagios

Zabbix

Prometheus

Ansible / Puppet

Job description

Position Summary

Nair Systems is actively seeking an experienced and dedicated Linux and Windows System Administrator specializing in the banking domain to join our dynamic operations in Qatar on a full-time basis. In this critical enterprise IT role, you will be responsible for installing, configuring, securing, and maintaining robust Linux and Windows server environments that power mission-critical financial applications. You will proactively monitor system performance, execute rigorous security patching, and ensure high availability and stability across enterprise infrastructure. This opportunity requires a skilled systems professional with strong cross-platform administration expertise and a proven background in banking IT operations.

Detailed Job Description

As a Linux and Windows System Administrator at Nair Systems, you will take full ownership of administering core operating system infrastructure supporting high-availability banking platforms in Qatar. Your day-to-day responsibilities include provisioning and maintaining Linux (RHEL, CentOS, Ubuntu, Rocky Linux) and Windows server instances, managing user access controls, and administering software installations, security updates, and kernel patching. You will monitor system performance, disk capacity, and service availability, troubleshoot complex OS-level bottlenecks, and maintain comprehensive audit logs in compliance with banking regulations. Furthermore, you will collaborate closely with database administrators, network engineers, and security teams to maintain resilient operational environments.

Key Responsibilities

• Install, configure, secure, and maintain enterprise Linux servers (RHEL, CentOS, Ubuntu, Rocky Linux, etc.) and Windows Server environments.
• Monitor system performance, resource utilization, hardware health, service availability, and disk capacity proactively.
• Perform comprehensive system administration tasks including user account management, permission matrices, and privileged access control.
• Manage software installation, scheduled patching, OS upgrades, and critical security vulnerability updates.
• Troubleshoot operating system anomalies, boot failures, storage connectivity issues, and performance degradation.
• Ensure strict adherence to banking industry security standards, hardening baselines, and data compliance frameworks.
• Coordinate with database administrators, network engineers, and application support teams to resolve infrastructure incidents.
• Maintain up-to-date system documentation, configuration baselines, asset inventories, and standard operating procedures.

Required Qualifications & Skills

• Minimum of 4+ years of professional experience in enterprise Linux and Windows system administration.
• Demonstrated operational background supporting IT infrastructure within the banking or financial services sector.
• Strong technical expertise in Linux distributions (RHEL, CentOS, Ubuntu, Rocky Linux) and Microsoft Windows Server.
• Proven proficiency in system performance monitoring, capacity planning, and resource optimization.
• Solid experience managing user permissions, Active Directory, access controls, and security hardening.
• Practical experience with software patching, package management, and kernel upgrades.
• Excellent problem-solving, analytical, and cross-functional communication capabilities.
• Mandatory eligibility to work onsite in Qatar.

Nice-to-Have Skills

• Professional certifications such as Red Hat Certified Engineer (RHCE), Microsoft Certified: Windows Server Hybrid Administrator Associate, or Linux Professional Institute (LPI).
• Familiarity with virtualization platforms (VMware vSphere, Hyper-V) and cloud environments (AWS, Azure).
• Basic scripting skills in Bash, PowerShell, or Python for task automation and log analysis.
• Experience with enterprise backup platforms, monitoring tools (Nagios, Zabbix, Prometheus), and ticketing systems.
• Prior working experience within regional banking institutions or IT managed services in the GCC.

Salary/Rate: Market Competitive / Standard

Contract Duration: Permanent / Full-Time Onsite (Qatar Operations)

Notice Period: Immediate to 30 Days