The Windows Desktop/Server Administrator will provide Tier III IT operations support across the Office of Information Management (OIM) and SC mission systems. This role is responsible for operating and maintaining Windows-based servers, desktops, and hybrid infrastructure, ensuring service availability, performance, security, and compliance with DOE directives. The ideal candidate will have deep expertise in Active Directory, Windows Server, endpoint management, and virtualization technologies, while also supporting cloud integrations and evolving enterprise service delivery models.