Senior Specialist, System Administration

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Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title:

Senior Specialist, System Administration

Job Code: 43767

Job Location:

Greenville, Texas

Job Schedule:

9/80 Regular:
Off every other Friday, 1st Shift or 5/8 Monday - Friday

Job Description:

• Install, configure, and maintain Linux servers and associated software in a multi-platform environment.
• Install, configure, and maintain Windows Server infrastructure, ensuring seamless integration and operation with Linux systems.
• Experience with virtualization platforms (vSphere, KVM, Proxmox, etc.)
• Hands-on Kubernetes experience, including deploying and debugging workloads
• Familiarity with SDN and modern networking (NSX-T, Calico, Cilium, load balancers, TLS)
• Proficiency with infrastructure-as-code (Terraform, Ansible) and automation scripting
• Experience with CI/CD tooling and Git-based workflows (Git Lab CI, Git Hub Actions, etc.)
• Understanding of identity and access management (OIDC, OAuth2, Keycloak or equivalent)
• Experience running stateful or platform components (object storage, databases, registries) in Kubernetes
• Strong understanding of distributed systems concepts, observability, and troubleshooting
• Monitor system performance and troubleshooting issues, ensuring high availability and optimal performance of all systems.
• Implement and oversee security protocols, conduct system backups, and ensure data recovery processes are in place.
• Collaborate with network staff to ensure smooth and reliable operation of software and systems for fulfilling business objectives and processes.
• Create and maintain documentation on system configuration, mapping, processes, and service records.
• Review system and application logs and verify completion of scheduled jobs such as backups.
• Automate routine tasks using scripting languages such as Bash, Python, or Perl.
• Familiarity / knowledge of disaster recovery software, exercises, and actual events.
• Provide technical support and guidance to users and other team members.
• Ensure compliance with internal policies and regulatory standards.

• Active CompTIA Security+ certification.
• Active security clearance
• A professional certification in Linux administration is preferred. Certifications such as LPIC, RHCSA, or CompTIA Linux+ are highly desirable.
• Bachelor’s Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related experience. In lieu of a degree, minimum of 10 years of prior related experience.
• Experience with virtualization technologies and container orchestration tools.
• Proficiency in cloud platforms (AWS, Azure, or Google Cloud).
• Proficiency in automation and configuration management using tools like Ansible, Puppet, or Chef.
• Expertise in Windows Server management, including configuration, patching, and performance optimization.
• Advanced scripting and automation skills using Power Shell, Bash, or Python to drive efficiency and process improvement.
• Exceptional problem-solving, verbal, and written communication skills to engage technical and non-technical stakeholders effectively.
• Proven ability to work independently and collaboratively, mentor junior team members, and quickly adapt to emerging technologies.
• Flexibility to participate in on-call rotations and perform after-hours work for critical incidents.

• Familiarity with monitoring tools (e.g., Solar Winds), backup/recovery solutions (e.g., Acronis, Backup Exec), and database systems (SQL Server, MySQL).
• Familiarity with security compliance and best practices.
• Knowledge of cybersecurity best practices.
• Microsoft Certified:
  Azure Administrator Associate
• VMware Certified Professional (VCP)

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