Benefits: 401(k) Dental insurance Health insurance Paid time off Training & development Vision insurance Location: Washington, DC Clearance: Public Trust Employment Type: Full-Time Company Description Celestial Innovations Group (CIG) is a fast-moving, mission driven technology firm working at the intersection of innovation, national security, and digital transformation. We support forward-thinking government agencies with cutting edge capabilities in cybersecurity, cloud, AI/ML, and IT modernization. At CIG, we don’t just check boxes. We solve real-world problems that matter. We’re building a culture where smart, curious, and driven people thrive. This is a place where your voice matters, your work has impact, and your growth is part of the mission. If you're looking for a team that values trust, clarity, and the power of innovation, this is where you want to be. Overview The Tier III Systems Administrator provides expert-level technical support, system administration, and problem resolution for enterprise IT environments supporting government missions. This role handles high-complexity issues, system maintenance, and infrastructure-level support. Key Responsibilities Provide advanced troubleshooting for servers, networks, virtualization platforms, and enterprise applications. Administer Windows Server environments, Active Directory, DNS, DHCP, and group policies. Manage system performance, patching, updates, and security compliance. Support configuration, monitoring, and optimization of infrastructure components. Troubleshoot escalated issues from Tier I and Tier II teams and provide root-cause analysis. Maintain documentation, configuration baselines, and operational procedures. Implement system improvements, migrations, and upgrades as directed. Ensure alignment with federal cybersecurity requirements, STIGs, and compliance frameworks. Work with security, engineering, and program teams to support mission-critical systems. Required Qualifications 5+ years of system administration or advanced technical support experience. Demonstrated experience managing and administering Microsoft SCCM (System Center Configuration Manager), including software deployment, patching, and system maintenance. Strong experience with Windows Server, virtualization (VMware/Hyper-V), network services, and enterprise tools. Deep understanding of Active Directory, GPO management, and security hardening. Ability to diagnose and resolve complex multi-system issues. Ability to obtain and maintain required government clearance. Preferred Qualifications CompTIA Security+ CCNA or MCSC equivalent Microsoft, VMware, Cisco, or similar advanced certifications. Experience in federal environments. Flexible work from home options available.
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