Linux Systems Administrator - Secret Clearance required

General Dynamics Information Technology • Arlington, VA

1d • $131,750 - $178,250 • Onsite

About The Position

GDIT is seeking a motivated Linux Systems Administrator to support mission critical enterprise infrastructure and network management applications within a Department of Defense environment. This position is ideal for an infrastructure professional with strong Linux administration fundamentals who wants to expand their expertise across enterprise network management, identity and access management, automation, cybersecurity, and infrastructure management technologies. Prior experience with all supported applications is not required. The selected candidate will work alongside experienced engineers and progressively develop expertise across the enterprise application environment.

Requirements

• Active DoD Secret clearance or higher at time of hire.
• Current CompTIA Security+ CE or equivalent certification meeting applicable DoD cybersecurity workforce requirements.
• Current certification in at least one relevant technical discipline, such as: RHCSA or RHCE, Red Hat Ansible certification, Linux Foundation certification, or Equivalent Linux, networking, virtualization, or infrastructure certification.
• 3 to 5 years of professional experience in Linux administration, systems administration, infrastructure engineering, enterprise application support, or a related technical discipline.
• At least 2 years of hands on Linux administration experience in a production environment.
• Experience troubleshooting operating system, application, connectivity, or infrastructure issues.
• Strong troubleshooting and analytical skills.
• Technical curiosity and ability to learn unfamiliar technologies.
• Initiative to identify problems and improvement opportunities.
• Interest in automation and continuous improvement.
• Ability to document and share technical knowledge.
• Ability to collaborate across systems, networks, cybersecurity, monitoring, and application teams.

Nice To Haves

• Red Hat Enterprise Linux experience.
• Bash or Python scripting.
• Ansible and GitLab experience.
• Knowledge of TCP/IP, DNS, LDAP, SNMP, and enterprise networking fundamentals.
• Experience applying DISA STIG requirements.
• Experience supporting classified, disconnected, or air gapped environments.
• Exposure to ISE, ClearPass, RSA, InfoBlox, CloudVision, AirWave, Cisco Prime, Junos Space, or similar enterprise infrastructure platforms.

Responsibilities

• Administer and maintain Red Hat Enterprise Linux systems supporting mission critical enterprise applications.
• Perform operating system installation, configuration, patching, upgrades, troubleshooting, and lifecycle maintenance.
• Monitor operating system and application health, resource utilization, storage, logs, services, and system performance.
• Troubleshoot Linux operating system, application, storage, connectivity, authentication, and performance issues.
• Support Linux systems operating within VMware and other virtualized environments.
• Support enterprise applications including Cisco ISE, Aruba ClearPass, RSA SecurID, LDAP, InfoBlox, CloudVision, AirWave, Cisco Prime, Junos Space, CyberSecure IMS, and related infrastructure management technologies.
• Participate in application upgrades, maintenance, configuration changes, testing, troubleshooting, and service restoration.
• Apply security patches, vulnerability mitigations, DISA STIG requirements, and approved configuration standards.
• Develop Bash, Python, or other approved scripts to automate recurring administrative activities.
• Support Ansible and GitLab based automation and configuration management.
• Identify opportunities to improve system reliability, reduce manual activities, and increase operational efficiency.
• Maintain system documentation, standard operating procedures, configuration information, troubleshooting guides, and recovery procedures.
• Participate in cross training, business hours operational support, and scheduled on call support.

Benefits

• Comprehensive benefits and wellness packages
• 401K with company match
• Competitive pay
• Paid time off
• Variety of medical plan options
• Health Savings Accounts
• Dental plan options
• Vision plan
• 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.
• Full flex work weeks where possible
• Variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave.
• 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.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: Associate degree