Senior Microsoft infrastructure administrator

Seeking a  Senior Microsoft infrastructure administrator will assist with the management of Windows Server, Active Directory, Group Policy, IIS, and Azure IaaS resources. This role will be responsible for day-to-day operations, security hardening, automation, and high-availability support across on‑premises and cloud environments. This position will partner closely with network, security, and application teams to ensure reliable service delivery and continuous improvement.

Interview: Teams

Location: Columbus, OH

Posting: 807076

Work: Remote

Key Responsibilities

·         Windows Server Administration: Configure and maintain Windows Server (2016–2025); manage roles/features (AD DS, DNS, DHCP, DFS, File Services), patching, performance tuning, and capacity planning.

·         IIS Administration: Configure and support IIS websites and applications, including application pools, bindings, SSL/TLS certificates, URL Rewrite/ARR, security hardening, and log analysis; optimize availability and performance.

·         Azure IaaS: Manage Azure VMs, VM Scale Sets, disks/storage, Azure Files, VNETs, subnets, NSGs/ASGs, Load Balancer/App Gateway, Bastion; implement backup (Azure Backup), DR (Azure Site Recovery), monitoring/alerts (Azure Monitor), and cost governance.

·         Active Directory (AD): Maintain domain health and replication; manage OU structure, users, groups, GMSAs, service accounts, and delegated permissions; troubleshoot authentication/Kerberos/NTLM issues.

·         Monitoring & Troubleshooting: Use native tools and platforms (Event Viewer, PerfMon, Azure Monitor, Log Analytics) to proactively detect and resolve issues impacting availability, performance, or security.

·         Group Policy (GPO): Design, implement, and maintain GPOs for security baselines, server configurations, and compliance; perform impact testing and change control.

·         Security & Compliance: Apply CIS/Microsoft security baselines, TLS configurations, vulnerability remediation, endpoint hardening, and log review; partner with security for audits and incident response.

·         Automation & Scripting: Build PowerShell scripts/modules to automate routine tasks (provisioning, patching, reporting) and Infrastructure-as-Code (e.g., Bicep/ARM/Terraform) for repeatable deployments.

·         Documentation & Change Management: Produce and maintain SOPs, diagrams, inventories, and runbooks; follow ITIL change/incident processes; contribute to knowledge base.

·         Collaboration & Support: Serve as escalation point for server/web platform issues; coordinate with app owners on deployments, certificates, and integration.

·         Lifecycle & Projects: Lead or support upgrades, migrations, re-platforming, and cloud adoption initiatives; drive standardization and modernization.

·         IRS 1075 Compliance: Provide answers and documentation, and implement changes required as part of IRS audit findings.

Required Qualifications

·         Experience: 5–7+ years administering Windows Server, AD, GPO, and IIS in mid‑to‑large enterprise environments.

·         Technical Proficiency:

o    Windows Server (2016–2025), AD DS, DNS, restores.

o    Group Policy design and troubleshooting (RSOP, GPMC, GPResult).

o    IIS configuration, SSL/TLS, bindings, app pools, URL Rewrite/ARR, logging.

o    Azure IaaS (VMs, VNETs, NSGs, Load Balancer/App Gateway, Azure Backup/ASR, Azure Monitor, Log Analytics).

o    PowerShell scripting (automation, modules, REST/Graph, CLI).

·         Process & Practices: Strong documentation, change control, and incident/problem management (ITIL).

·         Soft Skills: Clear communicator, collaborative, organized, and able to prioritize across multiple stakeholders and deadlines.

Preferred Qualifications

·         Certifications:

o    Microsoft Certified: Azure Administrator Associate (AZ‑104), Windows Server Hybrid Administrator Associate (AZ‑800/AZ‑801)

o    PlNice to Have: Azure Network Engineer (AZ‑700)

·         Enterprise Tools: Experience with MCM/ConfigMgr, WSUS, Defender for Cloud, Sentinel, Splunk/ELK, ServiceNow/Jira.

·         Networking: Solid understanding of TCP/IP, DNS, routing, VPN, firewall rules, load balancing, private endpoints.

·         Web/App Integration: Familiarity with .NET application hosting, SSO (SAML/OIDC), App Gateway/WAF, certificate pinning, mutual TLS.

·        Infrastructure-as-Code & Config: Experience with Bicep/ARM/Terraform, DSC, or Ansible; Azure Policy/Blueprints.

·         Azure DevOps: Experience with server-side configurations