Sr. System Administrator (Windows)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Sr. System Administrator (Windows) based in United States.

This role is responsible for managing and enhancing a large-scale Windows infrastructure environment supporting critical business operations. The position focuses on Windows Server administration, Active Directory management, automation, security, and infrastructure reliability. You will serve as a technical expert, helping design, troubleshoot, and improve enterprise systems across on-premises and cloud environments. The role offers the opportunity to influence infrastructure modernization, operational efficiency, and platform stability. Working closely with cross-functional infrastructure teams, you will contribute to resilient, secure, and scalable technology solutions. This position is ideal for an experienced systems professional who enjoys solving complex technical challenges and driving continuous improvement.

Accountabilities:: The Sr. System Administrator will provide advanced technical leadership for enterprise Windows environments, ensuring secure, reliable, and efficient infrastructure operations. The role combines hands-on administration, engineering, automation, troubleshooting, and modernization initiatives across diverse technology platforms.

Administer and engineer large Windows Server environments across physical, virtual, on-premises, and public cloud platforms.

Manage and optimize Active Directory environments, including domain controllers, replication, Group Policy, DNS dependencies, authentication, trusts, and directory health.

Design, plan, and implement system improvements, upgrades, migrations, and lifecycle management activities with minimal disruption.

Perform advanced troubleshooting, root-cause analysis, and resolution of complex infrastructure issues while maintaining technical documentation and operational standards.

Provide senior-level escalation support to improve system security, reliability, performance, recoverability, and supportability.

Monitor Windows systems and services, analyze operational trends, and proactively address risks before they impact business operations.

Implement security best practices, including vulnerability remediation, access controls, certificate management, and secure administration processes.

Support VMware environments by deploying, maintaining, and troubleshooting Windows virtual machines and assisting with virtualization platform initiatives.

Develop PowerShell scripts, modules, and automation workflows to streamline provisioning, configuration, patching, reporting, and remediation processes.

Contribute to infrastructure modernization efforts, including cloud migrations, automated deployment models, and platform improvements.

Support storage, backup, and recovery activities by validating system dependencies and ensuring recovery readiness.

Participate in 24/7 on-call rotations and scheduled after-hours maintenance activities when required.

Requirements:

The ideal candidate brings extensive experience managing enterprise Windows environments, strong troubleshooting capabilities, and a passion for automation and infrastructure improvement. This professional should be comfortable operating independently while collaborating with broader engineering teams.

Bachelor’s degree in Computer Science, Information Technology, Information Systems, or a related discipline preferred; equivalent professional experience accepted.

Minimum of 5 years of progressive experience in systems administration or systems engineering roles supporting complex enterprise environments.

Deep expertise with Windows Server administration, including Windows Server 2016, 2019, 2022, and newer environments, as well as legacy system support.

Strong Active Directory experience across multiple domains and forests, including Group Policy, DNS integration, LDAP, authentication, and identity infrastructure.

Advanced PowerShell scripting skills, including reusable functions, modules, automation workflows, error handling, logging, and API integrations.

Experience with VMware vSphere, Windows virtual machine deployment, troubleshooting, clustering, upgrades, and platform monitoring.

Knowledge of networking concepts including routing, switching, firewalls, and load-balancing technologies.

Experience integrating Windows environments with enterprise storage, backup solutions, and recovery processes.

Familiarity with Microsoft 365, Entra ID, Exchange Online, SharePoint Online, Teams, or Intune is a plus.

Exposure to Linux administration, monitoring platforms, IT service management tools, and cloud platforms such as Azure or AWS preferred.

Experience with automation, configuration management, Infrastructure as Code, or deployment tools such as Ansible and Terraform is highly valued.

Strong analytical, problem-solving, communication, and documentation skills with the ability to explain technical concepts clearly.

Benefits:

Competitive annual salary range of approximately $106,000–$125,000, based on experience and qualifications.

Fully remote work environment with opportunities to contribute to enterprise-scale technology initiatives.

Comprehensive medical, dental, and vision insurance coverage.

Company-paid life and disability insurance programs.

401(k) retirement plan.

Paid time off and paid parental leave.

Access to professional development resources and training opportunities.

Employee discounts and additional wellness resources.

Critical illness, hospital indemnity, legal support, pet insurance, and identity theft protection programs.

Employee Assistance Program (EAP) offering mental health resources and support.

How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best!  Why Apply Through Jobgether?    Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.     #LI-CL1