Windows Systems Engineer – (w/ active Secret)

About the role

Critical Solutions is seeking a Windows Systems Engineer to support a federal customer. The Windows Platform Services team maintains, supports, and secures Windows Server operating systems in a large‑scale enterprise environment, working onsite at the customer location to support unclassified or classified environments. The role requires collaboration with internal and external teams while supporting mission‑critical systems and services.

Responsibilities

• Perform Windows Server patching, IAVA vulnerability remediation, and security compliance activities across supported environments.
• Build, configure, maintain, and troubleshoot Windows Server 2016, 2019, and 2022 systems.
• Support the full IT infrastructure lifecycle, including planning, installation, configuration, ongoing administration, monitoring, troubleshooting, upgrades, and decommissioning.
• Ensure Windows Server platforms remain compliant with established operational policies, security requirements, and industry standards.
• Identify, troubleshoot, and resolve operating system, infrastructure, patching, and application‑related issues.
• Perform STIG remediation and support ongoing cybersecurity compliance activities.
• Support critical enterprise applications, infrastructure, and services in coordination with internal technical teams, customers, subcontractors, and vendors.
• Participate in projects and operational initiatives of moderate complexity,