Senior Windows Server Administrator

Subcontractor

Area(s) of responsibility

Job Title: Senior Windows Server Administrator 
Role:
Senior Windows Administrator Subject Matter Expert responsible for the design, administration, modernization, security, and operational stability of enterprise Windows server platforms.
The role spans Windows Server, Active Directory, core Wintel services, automation, security hardening, high availability, and disaster recovery, supporting large-scale on premises and hybrid infrastructures.
This position requires deep hands-on expertise, ownership of platform reliability, and strong leadership in migration, upgrade, and operational excellence initiatives.

Key Responsibilities:
Windows Server Platform Architecture & Operations
•    Architect, deploy, and operate enterprise Windows Server platforms (2016 / 2019 / 2022).
•    Ensure high availability, performance, and resilience of Windows environments.
•    Own the end-to-end server lifecycle including build, patching, upgrades, capacity planning, and decommissioning.
•    Integrate Windows platforms with virtualization, storage, backup, monitoring, and security solutions.
Active Directory & Core Windows Services
•    Administer and maintain Active Directory Domain Services, including Sites & Services, Trusts, FSMO roles, and replication.
•    Manage DNS, DHCP, Group Policy, File & Print services, WSUS, and Certificate Services.
•    Ensure AD health, security, availability, and performance across enterprise environments.

Security, Hardening & Compliance
•    Implement Windows security baselines, patch compliance, and system hardening standards.
•    Manage privileged access, service accounts, RBAC, and delegation models.
•    Support vulnerability remediation, audits, and compliance initiatives in regulated environments.

Migration, Upgrade & Modernization
•    Lead Windows Server upgrades, domain consolidations, and modernization programs.
•    Plan and execute server migrations with minimal or near-zero downtime.
•    Perform dependency analysis, risk assessment, validation, and post-migration stabilization.

Automation & Scripting
•    Automate administration and operational tasks using PowerShell.
•    Standardize server builds, configurations, and operational workflows through scripting and automation.
•    Reduce manual effort and improve reliability through repeatable automation frameworks.

Operational Readiness & Leadership
•    Act as L3 / SME escalation for complex Windows platform issues.
•    Produce and maintain HLDs, LLDs, SOPs, runbooks, and platform standards.
•    Collaborate with Virtualization, Network, Security, Cloud, and Application teams.
•    Provide technical leadership, mentoring, and knowledge transfer to engineering teams.

Required Skills & Qualifications:
•    10–12+ years of experience in enterprise Windows / Wintel administration roles.
•    Deep hands-on expertise in Windows Server 2016 / 2019 / 2022.
•    Strong experience with Active Directory, DNS, DHCP, Group Policy, and core Windows services.
•    Strong PowerShell scripting and automation skills.
•    Experience with Windows Failover Clustering and high-availability environments.
•    Proven experience supporting large-scale server estates, migrations, and upgrades.
•    Solid understanding of enterprise security, patching, and compliance standards.
•    Strong documentation, communication, and stakeholder management skills.
•    Microsoft certifications (Windows Server / Azure / Security) preferred.

Experience Level

Senior Level