Linux Administrator - Secret Clearance Required

General Dynamics Information Technology; Falls Church (VA); On-site; USD 110,000 - 140,000; Full time

Job summary

General Dynamics Information Technology is seeking a Linux Administrator in Falls Church, VA to support the Infrastructure Management Monitoring Team. The role focuses on maintaining Linux OS, applying patches, and ensuring system integrity while liaising with senior military and government leadership.

The ideal candidate brings 8+ years of Linux experience, strong RHEL know‑how, and the ability to implement STIGs, automation, and secure configurations in a mission‑critical environment.

Qualifications

• Experience delivering Linux server administration in enterprise environments.
• Strong knowledge of RHEL 7/8 and best practices for security and hardening.
• Proficiency with automation tools and scripting for repeatable tasks.
• Solid understanding of TCP/IP networking and system monitoring.

Responsibilities

• Provide system administration for Linux OS including patches and performance monitoring.
• Analyze issues across OS, servers, hardware and applications; perform recovery as needed.
• Coordinate with data center personnel for maintenance and deployments.
• Implement STIGs, security patches, and firewall configurations.
• Develop procedures and training materials for operations and incident response.
• Prepare performance metrics and usage reports for leadership.

Skills

Linux administration

RHEL 7/8

Automation scripting

Bash/Python/Ruby

Networking TCP/IP

Troubleshooting & debugging

Security & STIGs

Documentation

Team leadership

Education

Bachelor's degree in IT or related field

High school diploma or AA

Tools

Ansible

Puppet

Chef

Job description

Linux Administrator

We are seeking a Linux Administrator to support the Infrastructure Management Monitoring Team in Falls Church, Virginia. This role is critical to maintaining and supporting Linux operating systems. The ideal candidate is a proactive problem solver who thrives in a dynamic, mission-driven environment and can engage confidently with senior military and government leadership.

HOW A LINUX ADMINISTRTAOR WILL MAKE AN IMPACT:

• Provide system administration support for Linux operating systems including installing software, applying patches, managing file systems, monitoring performance, and troubleshooting alerts from monitoring tools.
• Analyzes and resolves problems associated with the operating system, servers, hardware, and applications software. Detects, diagnoses, and reports related problems on servers, including system failure analysis and recovery, insuring the consistency and integrity of file systems.
• In-depth hardware configuration knowledge, shell programming expertise, and a solid understanding of standard concepts, practices, and procedures. Relies on experience and judgment to plan and accomplish goals, performs a variety of tasks, and works under general supervision.
• Responsible for daily monitoring of interface programs between multiple enterprise systems; review daily logs and ensure successful completion.
• Perform incremental and full cold backups/patching.
• Responsible for DoW Linux Security Technical Implementation Guides (STIGs).
• Provide performance metrics and usage charts, including CPU usage, disk usage and network uptime for the Linux Servers.
• Provide general maintenance, upgrades, and new installation of servers and coordinate with data center personnel to execute. Document and generate business processes for day-to-day and emergency support procedures.
• Install, test, and verify Linux Security patches; coordinating, documenting requirements and timelines, and working closely with service owners.
• Perform systems security administration functions, including creation and maintenance of customer profiles and accounts.
• Responsible for creating and/or maintaining standard operating procedures for the Linux documentation library.
• Implement, configure, update, and maintain Ansible servers and scripts.
• Implement, configure, update, and maintain STIG Manager servers and scripts.
• Implement, configure, update, and maintain the Linux operating system firewall.

WHAT YOU’LL NEED TO SUCCEED:

Education/Equivalent Training Required:

• High school diploma or AA. Preferred - Bachelor’s degree in information technology, computer science or a related technical discipline, or the equivalent combination of education, technical certifications or training, or work experience.

Required Experience:

• 8+ years of overall demonstrated experience as a RHEL 7 and/or RHEL 8 Servers

Required Technical Skills Requirements:

• Experience administering RHEL 7/8 Linux servers and applying Linux best practices
• Experience in handling NFS, CIFS, and SMB permissions.
• Strong Linux administration skills with knowledge of enterprise network architectures
• Hands-on experience with automation/configuration tools (Ansible, Puppet, Chef)
• Skilled in scripting for automation (Bash, Ruby, Python, Perl)
• Solid understanding of Linux internals (system calls, file systems, processes)
• Working knowledge of TCP/IP and related protocols (HTTP, FTP, NFS)
• Experience using PowerShell for task automation
• Excellent problem-solving, analytical, and decision-making skills
• Reliable and responsive, consistently meeting expectations and following direction
• Strong customer service skills; able to engage senior military and government leaders
• Able to present ideas clearly in briefings, meetings, and leadership interactions
• Capable of delivering training sessions as needed
• Experienced in coordinating with stakeholders to meet deadlines and objectives
• Excellent communication and documentation abilities
• Strong organizational, collaborative, and team-oriented mindset
• Able to quickly absorb information and self-learn new requirements
• Maintains current industry knowledge and professional certifications
• Able to work under time constraints and adapt to changing requirements
• Experience leading or managing teams

Certification Requirements:

• Must Possess the appropriate baseline certification(s) to achieve DoW 8570.01-M Information Assurance Technical (IAT) Level II (CompTIA Security+ ce) and additional Computing Environment (CE) certification (RHEL7 and/or RHEL 8) When 8140 requirements are implemented on program/contract, employee will need to conform to 8140 certification standards.

Security Clearance Level Requirements:

• Must have a minimum of an active Secret clearance at time of interview and candidate must maintain active clearance.

Location:

• Falls Church, Virginia

Travel:

• Up to 10%. Travel may include attending conferences up to two times annually and site visits as needed.

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