Remote: Remote

Job Title – Senior System AdministratorLocation:MaduraiExperience:3-5 yearsRole OverviewWe are seeking an experiencedSystem Administratorwith 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 ResponsibilitiesInfrastructure & Cloud ManagementManage and monitorservers, storage, and networksacross on-premises and cloud (Azure / O365 / other cloud environments).AdministerOffice 365 servicesincluding Exchange Online, SharePoint, Teams, OneDrive, and licensing.Performuser migration and mailbox managementbetween tenants and environments.Security & Access ControlConfigure and maintainfirewall policies, VPNs, and VLANsfor secure and optimized access.Implement and monitorendpoint security (antivirus, DLP, EDR/XDR)across the organization.ManageActive Directory (AD), Azure AD, and Group Policy Objects (GPOs)for access control, security compliance, and user provisioning.Network & System AdministrationConfigure and manageLAN, WAN, VLANs, and VPN connectionsfor seamless connectivity.Troubleshootnetworking issues, internet downtime, login failures, and folder access issues .Ensure high availability and performance offile servers, application servers, and database servers .Endpoint & Remote Work SupportOverseeendpoint managementusing MDM/Endpoint Central/Intune for patching, updates, and compliance.Providetechnical supportfor end-users including remote workers (login, access,



VPN, printers, system issues).Maintain IT asset lifecycle including allocation, upgrades, and decommissioning.Backup & Disaster RecoveryManagebackup schedules (full, incremental, differential)and validate recovery procedures.Ensurebusiness continuitythrough tested disaster recovery plans.Documentation & ComplianceMaintain detailed documentation ofinfrastructure, policies, incidents, and resolutions .Support internal audits and compliance frameworks (SOC, ISO, GDPR).What We ExpectTechnical ExpertiseStrong knowledge ofWindows, Linux, and macOSoperating systems.Hands-on experience withO365 administration, cloud environments, and Active Directory .Proficiency infirewall configuration (policies, NAT, VPN)andnetwork segmentation (VLANs) .Experience inendpoint management(patching, antivirus, MDM, Intune/Endpoint Central).Knowledge ofbackup strategies, disaster recovery, and system migrations .Networking & SecuritySolid understanding ofIP addressing, DNS, DHCP, and routing concepts .Ability to troubleshootLAN/WAN/VPN/firewall issues .Knowledge ofsecurity best practicesincluding patch management and monitoring.Problem-Solving & SupportSkilled in troubleshootingsystem errors, login failures, and access issues .Ability to handle user escalations withpatience and explicit communication .Proactive in identifying and resolving potential system bottlenecks or risks.Soft Skills & GrowthStrongcommunication skillsto explain technical concepts in simple terms.Ability todocument processes, SOPs, and incident reportsclearly.Willingness tolearn new technologies and growwith evolving IT trends.

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