Senior Windows & Linux AdministratorWe are seeking a highly experienced Senior Windows & Linux Administrator with 15+ years of expertise in managing enterprise infrastructure environments.
The role requires deep technical knowledge in OS administration, system upgrades, security, monitoring, and production support across mission-critical systems.Key Responsibilities:System Administration & UpgradesInstall, configure, and upgrade operating systems across Windows and Linux platformsManage installation and upgrades of enterprise applications and runtime environments (e.g.,.NET, Java)Perform firmware and driver upgrades to ensure system compatibility and performanceApply latest OS patches, security updates, and service packs in compliance with enterprise policiesBackup & RecoveryManage and validate full system backups and application data backupsConfigure and maintain VM snapshots for disaster recovery and rollback scenariosEnsure backup jobs are running successfully and validate restoration processes periodicallySecurity & ComplianceInstall, configure, and maintain Antivirus/EDR solutionsApply and enforce enterprise security policies and hardening standardsManage and update certificates across servers and applicationsIdentify and resolve vulnerability and compliance gapsMonitoring & Performance ManagementConfigure and monitor CPU, memory, disk utilization, and system performance metricsMonitor application logs and troubleshoot performance or availability issuesEnsure alerts and monitoring mechanisms are properly configured and optimizedNetwork & ConnectivityTroubleshoot and resolve firewall and port-related issuesCoordinate with network teams to ensure seamless connectivity across environmentsAuthentication & Access ManagementDiagnose and resolve authentication failures (AD/Kerberos issues)Manage integration with enterprise directory services and identity systemsTroubleshooting & Incident ManagementInvestigate and resolve application incompatibilities, missing DLLs/libraries, and runtime issuesProvide L2/L3 support for critical production incidentsPerform root cause analysis and implement preventive measuresCore Skills & Expertise:Strong expertise in Windows Server and Linux (RHEL/CentOS/Ubuntu) administrationDeep understanding of patch management, security hardening, and vulnerability remediationExperience with virtualization platforms (VMware/Hyper-V) and snapshot managementKnowledge of backup tools, monitoring solutions, and log management systemsStrong knowledge of AD, Kerberos, and authentication mechanisms
Information Technology_USA - USA_Database Administrator in jacksonville at Unknown Company
This position is listed as full time and onsite.