Linux Systems Administrator

Primary Responsibilities

• Assist with deploying and managing Linux systems and services across multiple sites, leveraging automation and configuration management tools under team lead guidance.
• Collaborate with senior administrators to support infrastructure projects and migrations—including upgrades, capacity improvements, and technology refreshes—with minimal disruption.
• Participate in operational cycles, including patching, monitoring, maintenance, and performance optimization, ensuring required metrics for availability, security, and compliance are consistently met.
• Contribute to documentation efforts, such as user guides, knowledge bases, and system maintenance records.
• Follow established technical designs, processes, and procedures to maintain system standards.
• Perform routine system health checks and assist in monitoring system performance, security, and availability, as well as supporting recovery events and backup/disaster recovery operations.
• Learn and contribute to automation and scripting tasks, helping reduce manual effort by working with tools such as Ansible, Puppet, Terraform, and IaC frameworks.
• Maintain lab environments in a clean, organized, and compliant state, ensuring they meet the set standard.

Required Background

• Active TS/SCI Security Clearance (US Citizenship Required)
• A Bachelor's degree in Computer Science, Information Systems, Engineering, Business, or other related discipline. May be substituted for 5+ years of experience
• Requires security certification in compliance with DOD 8570 within 90 days of hire
• Requires professional certification in one or more areas within 6 months of hire
• Examples include RHCSA, RHCE, CKA, CCNA

Preferred Skills

• Knowledge of Linux systems and service administration (RHEL, Rocky, CentOS) with hands-on experience in remediation and patching.
• Basic familiarity with configuration management and automation tools such as Ansible, Puppet, or Terraform, with an interest in learning Infrastructure as Code and Git practices.
• Understanding and some experience with enterprise storage platforms and supporting technologies such as SAN, NFS, iSCSI, block, and object storage.
• Experience with virtualization platforms such as KVM and container platforms such as Docker.
• Understanding of basic networking concepts and services (TCP/IP, DNS, DHCP, VLANs, Subnets) and ability to assist in troubleshooting connectivity issues.
• Working knowledge of security compliance frameworks and how to apply them – including STIGs, DISA Benchmarks, CMMC, or CUI.
• Some experience or a strong interest in learning scripting or programming, such as Bash or Python, to support automation, system tooling, and troubleshooting tasks.
• Strong troubleshooting and problem-solving mindset, with a willingness to learn from senior administrators.

Location

This position is located at our Tucson, AZ Headquarters.

Benefits

• 100% employer-paid premiums for family medical and dental insurance, employee life insurance, short-term and long-term disability (STD & LTD)
• Flexible reimbursement spending accounts for medical expense and dependent care
• Immediate participation and vesting in the company’s Employee Stock Ownership Plan (ESOP) and 401(k) Plan
• Rincon Research Corporation is an equal opportunity employer and considers qualified applicants for employment without regard to race, color, creed, religion, national origin, sex, sexual orientation, gender identity and expression, age, disability, veteran status, or any other protected factor.