System Administration & Application Delivery Manager

Job DescriptionOwn and lead the design, administration, stability, and continuous improvement of Windows‑based infrastructure and end‑user virtualization platforms. The role requires strong hands‑on technical depth, advanced troubleshooting, and the ability to lead complex issues, mentor engineers, and ensure secure, highly available services.ResponsibilitiesKey Responsibilities Windows Server & Core Infrastructure LeadershipLead administration and advanced troubleshooting of Windows Server environments (production & DR).Own Active Directory Services, IncludingGPO design and enforcementDomain hardening and security best practicesFSMO roles, trust relationships, replication healthAdminister and troubleshoot DNS services, ensuring high availability, security, and correct name resolution across environments.Act as the technical authority for Windows platform‑related incidents, escalations, and root cause analysis. Messaging & Collaboration ServicesAdminister and support Exchange Online and Exchange Edge Servers, including:Mail flow, connectors, transport rulesEmail security and hybrid considerationsTroubleshooting delivery, authentication, and connectivity issuesCoordinate closely with security and compliance teams to ensure secure and compliant email services. High Availability & Application PlatformsDesign, implement, and manage Windows Failover Clustering for critical workloads.Support and troubleshoot SQL Server High Availability solutions (Always On, Failover Cluster Instance – knowledge focus).Administer and maintain IIS-hosted applications, including performance tuning and incident resolution.Ensure platform resiliency, uptime, and documented recovery procedures. Citrix & Workspace ServicesProvide administration and operational support for Citrix CVAD (Virtual Apps & Desktops) environments.Troubleshoot session, performance, profile, printing, and connectivity issues.Collaborate with virtualization and network teams to ensure stable end‑user experience. Patching, Security & Vulnerability ManagementLead Windows patching strategy across servers and supported platforms.Own remediation of security vulnerabilities, working with security teams to:Analyze exposureApply mitigations or fixesEnsure audit readinessReview vulnerability scans and ensure closure within agreed SLAs.Promote automation and standardization to reduce manual effort and operational risk. Leadership & GovernanceAct as a technical leader and escalation point for the Windows and workspace domain.Mentor and guide junior engineers through coaching and knowledge sharing.Produce and maintain technical documentation, runbooks, and SOPs.Participate in architecture discussions, change reviews, DR drills, and audit activities.Proactively identify technical risks and propose improvements to management.QualificationsStrong hands‑on experience in Windows Server AdministrationAdvanced expertise in AD, DNS, Group PolicySolid experience with Exchange Online & EdgeProven experience with Windows Clustering & SQL HA conceptsWorking knowledge of IIS administrationExperience in Windows patching, security hardening, and vulnerability remediationBasic PowerShell scripting skillsHands‑on experience with Citrix CVADExcellent troubleshooting, problem‑solving, and communication skills