Senior Systems Administrator (Windows / Exchange / Azure)
Location : Hybrid / On-site
Type : Full-time
Reports to : IT Infrastructure Manager
Role Summary
Own the reliability, security, and lifecycle of our Microsoft stack across on-prem and Azure. You’ll administer Windows Server and Microsoft Exchange, manage Azure resources, handle light SQL administration for line-of-business apps, and drive vulnerability remediation end-to-end.
Key ResponsibilitiesWindows Server & Core Services
Administer Windows Server 2016–2022 (AD DS, DNS, DHCP, DFS / DFSR, File / Print, GPOs).Implement RBAC / AGDLP, ABE, FSRM quotas / screens, and NTFS / share permissions hygiene.Patch management, OS hardening, baseline configuration (CIS / SCM), and certificate services (PKI).Microsoft Exchange (On-prem & Online)
Operate and maintain Exchange (on-prem and / or Exchange Online) : mailbox databases, DAGs, transport rules, connectors, journaling, retention, and eDiscovery.Manage hybrid identity and mail flow (MX, SPF / DKIM / DMARC, accepted domains, safe-senders / blocked senders).Troubleshoot queues, performance, client connectivity (Outlook / ActiveSync / Mobile).Azure Administration
Manage Azure AD / Entra ID, Conditional Access, PIM, SSPR / MFA, Azure AD Connect / Cloud Sync.Provision and govern Azure resources (VMs, storage, VNets, NSGs, load balancers, backup / recovery).Implement Azure security controls : Defender for Cloud, Update Management, RBAC, Key Vault, logging (Log Analytics / Sentinel).SQL (Light DBA Support)
Basic SQL Server administration : install / patch, backups / restores, jobs / agents, permissions, and performance triage (indexes, blocking basics).Partner with DBAs / app owners on upgrades and schema changes; ensure HA / DR runbooks are current.Vulnerability & Compliance
Own the vuln remediation cycle : ingest findings (Tenable / Nessus, Defender, Qualys, etc.), prioritize, patch or mitigate, and validate closure.Track exceptions / compensating controls, maintain dashboards / SLA metrics, and support audits (HIPAA, SOC 2, PCI, etc.).Group Policy / Intune hardening for servers; TLS / cipher suites, secure baseline drift detection.Operations & Automation
Write PowerShell for provisioning, reporting, and remediation at scale; maintain source-controlled scripts.Create runbooks, DR plans, and knowledge articles; participate in an on-call rotation.Required Qualifications
8+ years administering Windows Server in enterprise environments.8+ years with Exchange (on-prem and / or Exchange Online) including hybrid mail flow.5+ years Azure administration (AAD / Entra, VM / storage / networking, security).Practical PowerShell expertise (modules : ActiveDirectory, ExchangeOnline, Az, Graph).Experience with vulnerability scanners and patching workflows (WSUS / SCCM / Intune / Azure Update Mgt).Solid understanding of networking (TCP / IP, DNS, SMTP, TLS, certs) and identity (Kerberos / NTLM, OAuth).Nice-to-Have
SQL Server Admin Associate-level skills (backup / restore, security, job maintenance, performance basics).Experience with M365 (SharePoint, Teams, OneDrive), Intune, and Autopatch.Scripting beyond PowerShell (Python) and Infrastructure as Code (Bicep / Terraform).Monitoring / observability : SCOM, Nagios, Datadog, Sentinel, Splunk.Backup & recovery tooling (Veeam / Azure Backup) and DR testing in hybrid setups.Certifications (preferred, not required)
Microsoft : AZ-104 , AZ-500 , MS-102 , Exchange (legacy), SC-200 / SC-300 .Security : CompTIA Security+ , CISSP (plus).SQL : DP-900 or DP-300 (nice to have).Soft Skills
Strong ownership and prioritization; communicates clearly with technical and non-technical stakeholders.Documentation-first mindset; able to create concise runbooks and change plans.Collaboration across security, networking, apps, and support teams.KPIs / How success is measured
Patch / vulnerability SLA compliance and mean-time-to-remediate (MTTR).Service uptime and incident reduction for Exchange and core services.Audit readiness : clean access / permissions posture and documented controls.Automation coverage : percentage of routine tasks scripted / runbooked.