Senior Systems Administrator

Arlington, VA

• 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 utilizing VMware technologies.
• Serve as the technical lead for system architecture, upgrades, migrations, and modernization initiatives.
• Troubleshoot and resolve complex infrastructure, operating system, 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 PowerShell, 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.
• Perform additional duties as assigned to support team and organizational objectives.
• Other duties as assigned.

• Bachelor’s degree in information technology, Computer Science, Information Systems, Engineering, or a related technical discipline.
• 7+ years of relevant experience.
  • Experience with Windows and Linux operating systems
  • Experience with Windows and Linux operating systems
• DOD IAT Level II Certification is required.
• DOD Top Secret clearance w/ SCI eligibility
• Successfully pass background and drug screening

Knowledge, Skills, and Abilities:

• Proven experience with both Windows and Linux operating systems, demonstrating versatility in managing diverse environments.
• Advanced proficiency in Windows Server, infrastructure management, PowerShell scripting, and Linux administration.
• Hands-on experience with SCCM, OS management, DNS, SAN, group policy, DHCP, and Microsoft Windows technologies.
• Expertise in managing and optimizing Citrix environments, including Citrix Virtual Apps and Desktops, with a focus on ensuring high performance, scalability, and seamless user experience.
• Strong analytical and troubleshooting skills to diagnose and resolve complex technical issues effectively