Systems Administrator

San Antonio, TX

• Lead the administration, maintenance, and optimization of enterprise Windows and Linux server environments.
• Administer, maintain, configure, and optimize enterprise Linux server environments, with a primary focus on Red Hat Enterprise Linux (RHEL) and Ubuntu, while supporting Windows Server environments as required.
• Install, configure, harden, maintain, and troubleshoot RHEL, Ubuntu, and Windows Server operating systems across physical and virtual enterprise environments.
• Perform Linux system administration activities including user and group management, file systems, permissions, services, processes, storage, networking, package management, repositories, logging, and system resource management.
• Manage system services and configurations using Linux administration tools and technologies including system, SSH, RPM/YUM/DNF, APT, LVM, and related enterprise Linux utilities.
• Perform system performance analysis, capacity planning, resource management, and troubleshooting to ensure infrastructure availability, scalability, and reliability.
• Deploy, administer, and maintain virtualized server environments utilizing VMware technologies.
• Support system architecture, operating system upgrades, migrations, technology refreshes, and infrastructure modernization initiatives.
• Troubleshoot and resolve complex Linux, Windows, virtualization, infrastructure, and application-related issues across enterprise environments.
• Plan, test, and deploy operating system, application, firmware, and security patches while minimizing operational impact and maintaining system availability.
• Perform vulnerability remediation and system-hardening activities for Linux and Windows systems in accordance with DISA STIGs, DoD cybersecurity requirements, and organizational cybersecurity policies.
• Review vulnerability and compliance findings and remediate identified vulnerabilities, misconfigurations, and security deficiencies.
• Monitor enterprise servers and supporting infrastructure to identify performance, capacity, availability, and security issues and maintain operational readiness.
• Develop, implement, and maintain backup, recovery, business continuity, and disaster recovery capabilities for enterprise systems.
• Automate system administration, configuration management, patching, compliance, and operational tasks using Bash, Ansible, PowerShell, and other scripting or automation technologies.
• Develop and maintain Ansible playbooks, scripts, and standardized configurations to improve consistency, repeatability, security, and operational efficiency across server environments.
• Administer and support Windows Server systems, including Active Directory-integrated services, Group Policy, PowerShell-based administration, patching, system hardening, and troubleshooting.
• Develop and maintain system administration standards, build documentation, configuration baselines, standard operating procedures, troubleshooting procedures, and other technical documentation.
• Maintain accurate system configurations, inventories, operational documentation, and technical records in support of configuration management and cybersecurity requirements.
• Provide technical guidance and support to junior system administrators and other technical personnel as needed.
• Collaborate with network, cybersecurity, storage, backup, cloud, database, and application teams to implement, troubleshoot, and maintain integrated enterprise solutions.
• Evaluate infrastructure and automation technologies and recommend improvements that enhance system security, reliability, performance, manageability, and operational efficiency.
• Participate in incident response, system recovery, maintenance windows, and after-hours troubleshooting activities as required to support mission-critical systems.
• Perform additional duties as assigned in support of team and organizational objectives.

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

Knowledge, Skills and Abilities:

• Experience with Windows and Linux operating systems.

How you’ll grow  

At Chenega MIOS, our professional development plan focuses on helping our team members at every level of their careers to identify and use their strengths to do their best work every day. From entry-level employees to senior leaders, we believe there’s always room to learn.  

We offer opportunities to help sharpen skills in addition to hands-on experience in the global, fast-changing business world. From on-the-job learning experiences to formal development programs, our professionals have a variety of opportunities to continue to grow throughout their careers.  

Benefits  

At Chenega MIOS, we know that great people make a great organization. We value our team members and offer them a broad range of benefits.  

Learn more about what working at Chenega MIOS can mean for you.