Linux System Administrator

Job Description

Job Description

Linux Systems Administrator | $70–$90/Hour

Location: San Jose, CA 95125

Duration: 12-Month Contract (Potential to Extend or Convert to FTE)

Pay Range: $70–$90/hour

Industry: Aerospace & Space Technology

Build. Secure. Protect. Take Your Linux Expertise to the Next Level!

Are you a Linux Systems Administrator who knows how to keep critical infrastructure running while maintaining the highest security standards?

ATR International is looking for an experienced Linux Systems Administrator to support a leading organization in the aerospace and space technology industry. This is an exciting opportunity for someone with hands-on Linux administration experience and a strong understanding of cybersecurity compliance in regulated environments.

You'll play an important role in maintaining, securing, and hardening Linux-based systems while supporting compliance with federal cybersecurity standards.

What You'll Be Doing:

• Administer, maintain, and troubleshoot Linux servers, including RHEL, CentOS, and Ubuntu.
• Configure Linux network interfaces, routing, and firewall rules using tools such as Netplan, NetworkManager, iptables, nftables, and firewalld.
• Implement system hardening practices using CIS Benchmarks and STIG standards.
• Support cybersecurity compliance initiatives involving NIST 800-171, CMMC, DFARS, and related frameworks.
• Identify vulnerabilities, coordinate patching, and track remediation activities and POA&Ms.
• Manage user access controls, LDAP, SMB/Samba, logging, and system backups.
• Collaborate with security, engineering, and program teams to maintain secure infrastructure.
• Support security assessments, audits, documentation, and incident response activities.

What We're Looking For:

• 3–5+ years of Linux Systems Administration experience.
• Experience with Linux distributions such as RHEL, CentOS, or Ubuntu.
• Hands-on experience with cybersecurity compliance frameworks such as NIST 800-171, CMMC, RMF, or similar.
• Background supporting aerospace, defense, or ITAR-regulated environments.
• Knowledge of CIS Benchmarks, STIGs, and Linux security hardening.
• Scripting experience using Bash, Python, or similar.
• Strong understanding of networking, firewalls, and access controls.
• Experience with Linux installation and application deployment.

Nice to Have:

• RHCSA, RHCE, Security+, CISSP, or other relevant certifications.
• Experience supporting CMMC Level 2 or Level 3 compliance.
• Familiarity with Ansible, Puppet, or other configuration management tools.
• Knowledge of ITAR/EAR export control requirements.
• Experience with Linux installation and application deployment on PowerPC.

Education:

Bachelor's degree in Computer Science, Information Security, or a related field, or equivalent professional experience.

Why Consider This Opportunity?

• Competitive compensation of $70–$90/hour.
• 12-month contract with potential to extend or convert to full-time employment at any time.
• Opportunity to work on security-critical infrastructure in the aerospace and space technology industry.
• Potential access to medical, dental, vision, 401(k), and other benefits, subject to eligibility and applicable plan terms.

Important Employment Information

• Candidates must have valid U.S. work authorization. Visa sponsorship is not available.
• W2 employment only.
• Background check and drug screening are required upon offer.

Interested? Let's Connect!

If you have a strong Linux administration background and experience securing systems in regulated environments, we'd love to hear from you!

Apply today or send us a message to learn more about this opportunity.

ATR International is an equal opportunity employer committed to building an inclusive workplace.