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, Share Point, Teams, One Drive, 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 transparent 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 new technologies and grow
with evolving IT trends.

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