Systems Administrator (Linux / RHEL)

Usa Fl Macdill Afbmid

Systems AdministratorInfrastructure & Cloud

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Quick Summary

Key Responsibilities

Remediate security findings identified through ACAS/Tenable reports and OpenSCAP scans by performing hands-on system patching, configuration updates, and service hardening on RHEL 8/9 systems.

Requirements Summary

Skills:Assured Compliance Assessment Solution (ACAS), Linux Management,

Technical Tools

Systems AdministratorInfrastructure & Cloud

Regular

Clearance Level Must Currently Possess:

Secret

Clearance Level Must Be Able to Obtain:

Top Secret/SCI

None

Job Family:

IT Infrastructure and Operations

Requirements

~1 min read

Applicable Intermediate DoW 8140 or DoW 8570 Certification (e.g., Security+ CE, CySA+, Linux+, or SSCP).
Bachelor's Degree in a related discipline OR three (3) years of hands-on experience administering and hardening Red Hat Enterprise Linux (RHEL) environments.
Direct experience in Linux system administration, command-line operations (CLI), user management, and package patching.
Hands-on experience applying DISA STIGs to RHEL systems using SCAP Compliance Checker (SCC) or OpenSCAP.
Familiarity with reviewing ACAS/Tenable vulnerability reports and executing Linux-specific remediation steps.
Understanding of PKI certificate installation and PAM/SSSD authentication integration.
- Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE).
- Experience supporting USCENTCOM Linux server infrastructure.
- Hands-on experience writing Ansible playbooks and Bash scripts for STIG compliance automation.
- Experience with Red Hat Satellite Server for centralized lifecycle and errata management.
- Experience preparing Linux systems for DoW Cyber Defense Command (DCDC) Cyber Operational Risk Assessments (CORA).

Assured Compliance Assessment Solution (ACAS), Linux Management, Red Hat Enterprise Linux (RHEL)

None

3 + years of related experience

Yes

Job Description:

The Compliance Systems Administrator (Linux / RHEL) plays a critical, hands-on role in securing and maintaining enterprise Red Hat Enterprise Linux (RHEL) and Unix-based operating systems. This position is responsible for the direct technical execution of system hardening, patching, identity integration, and vulnerability remediation to ensure Linux servers and appliances adhere to Department of War (DoW) cybersecurity standards in preparation for CORA cyber inspections.

Responsibilities

~1 min read

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Remediate security findings identified through ACAS/Tenable reports and OpenSCAP scans by performing hands-on system patching, configuration updates, and service hardening on RHEL 8/9 systems.
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Technically implement and maintain compliance with Red Hat Enterprise Linux DISA STIGs, Cyber Tasking Orders (CTOs), and IAVM notices.
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Configure, troubleshoot, and enforce mandatory access controls using SELinux (Security-Enhanced Linux) in enforcing mode.
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Manage and maintain central identity, PAM (Pluggable Authentication Modules), SSSD, and DoW PKI/CAC authentication mechanisms for user and administrative access.
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Configure and maintain host-based firewalls (firewalled/iptables) and audit daemon logging (audited) in strict compliance with DoW auditing requirements.
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Utilize package management tools (YUM/DNF), Red Hat Satellite, or local repositories to deploy security errata and software updates across air-gapped or restricted networks.
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Develop and execute Bash and Ansible playbooks to automate STIG hardening, configuration audits, and compliance validation.
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Develop, implement, and document technical mitigation strategies and POA&Ms for system-specific Linux vulnerabilities that cannot be immediately fixed.
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Compile technical evidence, OpenSCAP evaluation reports, and configuration artifacts for CORA inspection teams.

At GDIT, the mission is our purpose, and our people are at the center of everything we do.

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Rewards: Comprehensive benefits and wellness packages, 401K with company match, competitive pay and paid time off
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The likely salary range for this position is $89,250 - $120,750. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Scheduled Weekly Hours:

Less than 10%

Onsite

Work Location:

USA FL MacDill AFB

Additional Work Locations:

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.

We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.

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