Job Title – Senior System Administrator
Location: Madurai
Experience: 3-5 years

Role Overview
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.

Key Responsibilities
Infrastructure & Cloud Management
Manage and monitor servers, storage, and networks across on-premises and cloud (Azure / O365 / other cloud environments).
Administer Office 365 services including Exchange Online, SharePoint, Teams, OneDrive, and licensing.
Perform user migration and mailbox management between tenants and environments.
Security & Access Control
Configure and maintain firewall policies, VPNs, and VLANs for secure and optimized access.
Implement and monitor endpoint security (antivirus, DLP, EDR/XDR) across the organization.
Manage Active Directory (AD), Azure AD, and Group Policy Objects (GPOs) for access control, security compliance, and user provisioning.
Network & System Administration
Configure and manage LAN, WAN, VLANs, and VPN connections for seamless connectivity.
Troubleshoot networking issues, internet downtime, login failures, and folder access issues .
Ensure high availability and performance of file servers, application servers, and database servers .
Endpoint & Remote Work Support
Oversee endpoint management using MDM/Endpoint Central/Intune for patching, updates, and compliance.
Provide technical support for end-users including remote workers (login, access, VPN,



printers, system issues).
Maintain IT asset lifecycle including allocation, upgrades, and decommissioning.
Backup & Disaster Recovery
Manage backup schedules (full, incremental, differential) and validate recovery procedures.
Ensure business continuity through tested disaster recovery plans.
Documentation & Compliance
Maintain detailed documentation of infrastructure, policies, incidents, and resolutions .
Support internal audits and compliance frameworks (SOC, ISO, GDPR).

What We Expect
Technical Expertise
Strong knowledge of Windows, Linux, and macOS operating systems.
Hands-on experience with O365 administration, cloud environments, and Active Directory .
Proficiency in firewall configuration (policies, NAT, VPN) and network segmentation (VLANs) .
Experience in endpoint management (patching, antivirus, MDM, Intune/Endpoint Central).
Knowledge of backup strategies, disaster recovery, and system migrations .
Networking & Security
Solid understanding of IP addressing, DNS, DHCP, and routing concepts .
Ability to troubleshoot LAN/WAN/VPN/firewall issues .
Knowledge of security best practices including patch management and monitoring.
Problem-Solving & Support
Skilled in troubleshooting system errors, login failures, and access issues .
Ability to handle user escalations with patience and clear communication .
Proactive in identifying and resolving potential system bottlenecks or risks.
Soft Skills & Growth
Strong communication skills to explain technical concepts in simple terms.
Ability to document processes, SOPs, and incident reports clearly.
Willingness to learn recent technologies and grow with evolving IT trends.

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