Senior Enterprise Red Hat Enterprise Linux (RHEL) Administrator

Req ID: RQ231248

Type of Requisition: Regular

Clearance Level Must Be Able to Obtain: Top Secret/SCI

Public Trust/Other Required: None

Job Family: IT Infrastructure and Operations

Skills:

Information Technology (IT),System Administration,Technology Implementations

Experience:

8 + years of related experience

US Citizenship Required:

Yes

Job Description:

The Senior Enterprise Red Hat Enterprise Linux (RHEL) Administrator serves as a senior technical authority responsible for the administration, sustainment, security, resiliency, and modernization of enterprise Linux infrastructure supporting the Defense Threat Reduction Agency (DTRA) mission at Fort Belvoir, Virginia. The position provides advanced systems administration, troubleshooting, automation, cybersecurity compliance, and technical leadership for mission-critical environments.

The incumbent supports the Defense Stockpile Management Systems (DSMS) portfolio, including the Defense Integration and Management of Nuclear Data Services (DIAMONDS), Joint Application Design Environment (JADE), Nuclear Inventory Management and Cataloging System (NIMACS), Government Acceptance Testing (GAT), and DIAMONDS Accountability Training System (DATS). The Senior RHEL Administrator ensures these environments remain secure, available, compliant, recoverable, and capable of supporting high-priority operational requirements.

How a Senior Enterprise RHEL Administrator Will Make an Impact

• Serve as a senior technical authority for Red Hat Enterprise Linux platforms supporting DSMS mission applications, services, and enterprise infrastructure.

• Collaborate with Government stakeholders, program leadership, cybersecurity personnel, and technical operations teams to analyze, design, configure, test, integrate, sustain, and modernize RHEL systems.

• Develop, maintain, and enforce scalable RHEL configuration-management practices, baseline configurations, automation, system hardening standards, and operational procedures.

• Conduct platform needs assessments, gap analyses, architecture reviews, and capacity evaluations; develop and implement technically sound solutions to improve availability, performance, resiliency, and maintainability.

• Deploy, configure, patch, upgrade, and sustain RHEL operating systems, applications, security tools, configuration-management services, and supporting infrastructure.

• Troubleshoot and resolve complex RHEL platform, application, network, storage, authentication, automation, and performance issues; lead root-cause analysis and document corrective actions.

• Implement, manage, validate, and audit DISA Security Technical Implementation Guides (STIGs), vulnerability remediation actions, mitigation strategies, Plan of Action and Milestones inputs, and cybersecurity compliance evidence.

• Support enterprise patching, vulnerability management, system monitoring, audit logging, backup and recovery, disaster recovery, and continuity-of-operations requirements for RHEL platforms.

• Serve as a primary technical point of contact for RHEL platform support affecting mission applications and services, coordinating resolution with Application, Database, Network, Enterprise, Cybersecurity, Virtualization, and Field Support teams.

• Develop and maintain technical documentation, standard operating procedures, implementation plans, recovery procedures, automation scripts, and configuration records.

• Provide technical leadership, mentoring, and quality assurance for junior administrators; guide implementation decisions and promote consistent, secure, and supportable RHEL operations across the enterprise.

Required Knowledge, Skills, and Abilities:

• Capability to work both independently and as part of a team.

• Strong communication and collaboration skills.

• Advanced problem solving and critical thinking abilities.

• Adept in the exclusive use and navigation of the RHEL command line interface.

• Holistic understanding of RHEL platform interactions with external applications, platforms, and services (e.g., Active Directory/LDAP integration, network file service protocols, Active Directory Certificate Services).

• Intermediate RHEL 7 and 8 platform system administration skills and knowledge of configuration of technologies and services provided.

• Significant experience with the development and execution of shell scripts.

Preferred Knowledge, Skills, and Abilities:

• Experience supporting: Appian Platform, Tenable Security Center + Nessus (ACAS), Trellix ESS (client-side), IdM, and git repositories.

• Intermediate experience with RHEL 7 and 8 platform system engineering and concepts (e.g., automation, orchestration, strategic planning).

• Understanding of DevSecOps concepts and practices.

• Basic knowledge of SecurID RSA multifactor authentication RHEL client configurations.

• Strong work ethic, motivation, and a high desire to learn.

• Effective time management and organization skills.

Qualifications:

• BS degree in a related field, this can be substituted by work experience.

• Required: 8+ years of experience.

• Required: Fully adjudicated Top Secret clearance w/ TS/SCI eligibility.

• Preferred Certifications: Red Hat (e.g., Red Hat Certified System Administrator/RHCSA), Oracle Certified Professional - Oracle Linux System Administrator/OCP - OLSA)

GDIT IS YOUR PLACE:

• 401K with company match

• Comprehensive health and wellness packages

• Internal mobility team dedicated to helping you own your career

• Professional growth opportunities including paid education and certifications

• Cutting-edge technology you can learn from and apply to solve real world problems

#ARMA

The likely salary range for this position is $137,700 - $186,300. 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.

Total Rewards at GDIT:

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.

Our Identity Verification Process:

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.

About Our Work:

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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Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans