Senior Systems Administrator

Senior Systems Administrator – Arlington, VA

Chenega Military, Intelligence & Operations Support (MIOS) is seeking a Senior Systems Administrator to manage and enhance enterprise Windows and Linux server environments, ensure system security and performance, and support mission‑critical operations.

• Lead the administration, maintenance, and optimization of enterprise Windows and Linux server environments.
• Perform advanced system capacity planning, performance analysis, and resource management to ensure infrastructure scalability and reliability.
• Design, deploy, and manage complex virtualized environments using VMware technologies.
• Serve as the technical lead for system architecture, upgrades, migrations, and modernization initiatives.
• Troubleshoot and resolve complex infrastructure, operating systems, and application issues across enterprise environments.
• Install, configure, and maintain Windows Server and Linux operating systems in accordance with organizational requirements and industry best practices.
• Apply operating system, application, and security patches to maintain compliance, security, and operational effectiveness.
• Lead vulnerability remediation efforts and ensure systems remain compliant with DISA STIGs, DoD cybersecurity requirements, and organizational security policies.
• Monitor enterprise systems and infrastructure to ensure continuous availability, performance, and operational readiness.
• Develop and implement backup, recovery, business continuity, and disaster recovery strategies.
• Automate administrative tasks and system management functions using scripting and automation tools such as Power Shell, Bash, or Ansible.
• Develop, maintain, and enforce technical standards, policies, procedures, and system documentation.
• Mentor junior administrators and provide technical guidance across infrastructure‑related projects and operational activities.
• Collaborate with network, cybersecurity, cloud, and application teams to design and implement integrated enterprise solutions.
• Evaluate emerging technologies and recommend improvements to enhance system performance, security, and operational efficiency.
• Support after‑hours maintenance, troubleshooting, and incident response activities as required.

• Bachelor's degree in Information Technology, Computer Science, Information Systems, Engineering, or a related technical discipline.
• 7+ years of relevant experience with Windows and Linux server environments.
• DOD IAT Level II Certification required.
• DOD TS/SCI clearance with the ability to obtain a CI polygraph.

• Extensive experience with Windows and Linux operating systems.

Chenega MIOS offers a comprehensive benefits package and opportunities for professional development in a supportive culture.