Windows Server Administrator

We are seeking an experienced Windows Server Administrator for a 100% onsite contract in Austin, Texas
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The Windows Server Administrator will provide advanced operational and technical support for an enterprise Windows Server environment. This role will perform day-to-day server administration, security remediation, automation, and lifecycle management activities across development, test, and production environments. Responsibilities include administering and maintaining enterprise Windows Server environments across physical and virtual infrastructure; supporting SCCM/MECM operations such as operating system deployments, patching, software distribution, and configuration compliance;

performing vulnerability remediation activities including patching, system hardening, and validation; administering Active Directory services including user and group management, Group Policy, DNS, and organizational unit structures within a large enterprise environment; developing and maintaining Power Shell scripts to automate administrative tasks and operational workflows; managing internal PKI and external/public certificate processes including certificate requests, renewals, installation, and troubleshooting; participating in formal change management processes including documentation, impact analysis, implementation, and validation;

troubleshooting complex server, authentication, certificate, and configuration issues; adhering to enterprise standards, security requirements, and operational procedures; and collaborating with infrastructure, application, and security teams to support enterprise operations.

• 8+ years of experience administering Windows Server environments in a large enterprise or government organization
• 5+ years of hands-on experience with SCCM/MECM, including operating system deployments, patch management, and software distribution
• 5+ years of experience administering Active Directory in a multi-domain or enterprise-scale environment
• Strong experience with vulnerability remediation and security patching in regulated or compliance-driven environments
• Extensive experience with Power Shell scripting and automation
• Previous experience managing internal PKI and external/public certificates
• Experience operating within formal change management processes
• Strong troubleshooting and problem-solving experience within enterprise server environments
• Strong written and verbal communication skills

• Previous experience supporting Windows Server 2019 and Windows Server 2022 in highly available enterprise environments
• Previous experience working in government or large public-sector organizations
• Knowledge of ITIL or ITSM frameworks and operational best practices
• Experience supporting hybrid or cloud-integrated environments such as Azure-connected services
• Knowledge of enterprise security standards and audit requirements
• Relevant Microsoft certifications related to Windows Server, SCCM, Azure, or security technologies

Sistema offers competitive pay and solid benefits, including medical, dental, and vision coverage. We keep things simple, focus on people, and prioritize long-term relationships with our clients and consultants.

Apply now if you’re a clear communicator, problem solver, and ready to work onsite in Austin, Texas!