Windows Server and Microsoft Exchange server Admin

Senior Systems Administrator (Windows / Exchange / Azure) Location: Hybrid/On-site
Type: Full-time • Exempt
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.

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