Job Title – Senior System Administrator /n Location: Madurai /n Experience: 3-5 years /n Role Overview /n We are seeking an experienced System Administrator with strong expertise in enterprise IT infrastructure, cloud platforms, and endpoint management. This role requires hands-on experience in managing on-premises and cloud systems, ensuring security and availability, and supporting business continuity through proactive monitoring, configuration, and incident resolution. /n Key Responsibilities /n /n

- Infrastructure & Cloud Management

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- Manage and monitor servers, storage, and networks across on-premises and cloud (Azure / O365 / other cloud environments).

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- Administer Office 365 services including Exchange Online, SharePoint, Teams, OneDrive, and licensing.

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- Perform user migration and mailbox management between tenants and environments.

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- Security & Access Control

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- Configure and maintain firewall policies, VPNs, and VLANs for secure and optimized access.

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- Implement and monitor endpoint security (antivirus, DLP, EDR/XDR) across the organization.

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- Manage Active Directory (AD), Azure AD, and Group Policy Objects (GPOs) for access control, security compliance, and user provisioning.

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- Network & System Administration

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- Configure and manage LAN, WAN, VLANs, and VPN connections for seamless connectivity.

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- Troubleshoot networking issues, internet downtime, login failures, and folder access issues.

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- Ensure high availability and performance of file servers, application servers, and database servers.

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- Endpoint & Work from home Support

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- Oversee endpoint management using MDM/Endpoint Central/Intune for patching, updates, and compliance.

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- Provide technical support for end-users including remote workers (login, access, VPN, printers,



system issues).

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- Maintain IT asset lifecycle including allocation, upgrades, and decommissioning.

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- Backup & Disaster Recovery

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- Manage backup schedules (full, incremental, differential) and validate recovery procedures.

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- Ensure business continuity through tested disaster recovery plans.

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- Documentation & Compliance

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- Maintain detailed documentation of infrastructure, policies, incidents, and resolutions.

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- Support internal audits and compliance frameworks (SOC, ISO, GDPR).

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- Technical Expertise

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- Strong knowledge of Windows, Linux, and macOS operating systems.

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- Hands-on experience with O365 administration, cloud environments, and Active Directory.

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- Proficiency in firewall configuration (policies, NAT, VPN) and network segmentation (VLANs).

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- Experience in endpoint management (patching, antivirus, MDM, Intune/Endpoint Central).

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- Knowledge of backup strategies, disaster recovery, and system migrations.

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- Networking & Security

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- Solid understanding of IP addressing, DNS, DHCP, and routing concepts.

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- Ability to troubleshoot LAN/WAN/VPN/firewall issues.

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- Knowledge of security best practices including patch management and monitoring.

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- Problem-Solving & Support

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- Skilled in troubleshooting system errors, login failures, and access issues.

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- Ability to handle user escalations with patience and clear communication.

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- Proactive in identifying and resolving potential system bottlenecks or risks.

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- Soft Skills & Growth

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- Strong communication skills to explain technical concepts in simple terms.

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- Ability to document processes, SOPs, and incident reports clearly.

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- Willingness to learn new technologies and grow with evolving IT trends.

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📌 Senior System Administrator (Madurai)
🏢 Optisol Business Solutions
📍 Madurai