Senior Linux System Administrator

General Dynamics Information Technology, Inc.; Mississippi; On-site; USD 91,000 - 123,000; Full time

Benefits offered by this job

Health plan options

401(k) with company match

Paid time off and holidays

Job summary

General Dynamics Information Technology, Inc. seeks a Senior Linux System Administrator to manage Linux servers processing data for the National Data Buoy Center at Stennis Space Center, MS. You will ensure 24x7 readiness, patching, security hardening, and cloud integration across on‑premises and AWS environments.

The role emphasizes automation, audits, and collaboration with developers and stakeholders to maintain compliance, optimize performance, and support mission-critical data flows.

Qualifications

• 8+ years of experience installing, configuring, operating, and maintaining IT infrastructure.
• Advanced knowledge of Red Hat Linux, Apache, Tomcat, drivers, vulnerabilities, STIG updates.
• Experience with AWS and migration of Linux systems and cloud environments.
• Programming knowledge in Java, Python, PHP, and Perl.
• Ability to obtain NOAA/NASA background investigation and facility access.
• Excellent communication and ability to work autonomously.

Responsibilities

• Participate in a rotation to provide 24x7x365 on-call support for essential data processing.
• Support IT architecture improvements to ensure continuity of operations.
• Support A&A audits through security patching and POAM requirements; maintain ATO.
• Maintain Linux servers on premises and in AWS; upgrade OS and apply patches.
• Ensure reliable backups and manage server certificates; maintain RHEL subscriptions.
• Communicate maintenance plans and impacts to stakeholders; automate routine tasks.

Skills

Autonomous work style

Strong communication

Education

Bachelor's degree in Computer Science or Information Systems

Tools

Red Hat Enterprise Linux

Apache

Tomcat

AWS

AWS Lambda

EC2

Job description

Senior Linux System Administrator

The position is for the Senior Linux System Administrator responsible for the servers that process data from a global network of buoys, managed by the National Data Buoy Center (NDBC). This position is located at the NDBC facility at the Stennis Space Center in Mississippi.

Responsibilities

• Participate in a rotation to provide 24x7x365 on-call support for the primary IT mission essential data processing, applications, and functions to support the continuity of operations of the NDBC information system.
• Support IT architecture improvements to ensure continuity of operations for primary mission essential functions and the flow of data.
• Support the annual NDBC IT Assessment and Authorization (A&A) audits through security patching and security-minded configuration updates; actively address changes needed as a result of Plan of Action & Milestones (POAM) requirements; help ensure NDBC maintains its Authority to Operate (ATO).
• Maintain all Linux-based servers and clients located on premises and in an AWS cloud environment.
  1. Follow system administration best practices.
  2. Patch and configure systems in compliance with NOAA security requirements.
  3. Upgrade operating systems in advance of end-of-support dates.
  4. Support software development efforts.
  5. Deploy software application updates for both COTS as well as internal applications.
  6. Plan and implement migration of local systems to a cloud environment, where possible, in a cost-effective manner.
  7. Ensure reliable system and data backups.
  8. Manage/maintain server certificates.
  9. Maintain Red Hat Enterprise Linux subscriptions.
  10. Perform ongoing performance tuning, hardware upgrades, and resource optimization as required.
• Communicate/brief upcoming maintenance efforts and/or anticipated impacts to stakeholders.
• Implement strategies to automate routine administration tasks.
• Maintain and monitor data center environmental equipment.

Education Requirements

Bachelors of Computer Science, Information Systems, or equivalent. Experience may be considered as an equivalent.

Requirements

• 8 years or more experience preferred in the installation/configuration, operation, and maintenance of IT system hardware and software and related IT infrastructure.
• Demonstrated advanced knowledge and experience supporting Red Hat Linux, Apache, Tomcat, drivers, applications, vulnerabilities, security requirements and postures, quarterly STIG updates.
• Knowledge of AWS solutions and migration of Linux systems is considered a plus.
• An understanding of programming languages, such as Java, Python, PHP, and Perl.
• Experience in installing and maintaining system hardware, operating systems, software systems, network systems, security systems.
• Experience applying OS patches and upgrades on a regular basis, and upgrades of administrative tools and utilities; configuring, adding, and removing services as necessary.
• Experience implementing automation to streamline recurring system administration tasks is highly preferred; experience with scripting languages.
• Experience with AWS lamda, containers, EC2 instances is desirable.
• Able to work autonomously and take initiative in identifying areas for improvements and proposing solutions.
• Able to communicate effectively with coworkers and stakeholders.
• Must be able to successfully complete a NOAA (Stennis Space Center)/NASA background investigation for site/system access.
• Must be able to obtain and maintain facility credentials/authorization.

Salary

The likely salary range for this position is $90,950 - $123,050. 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: 40
Travel Required: None
Telecommuting Options: Onsite
Work Location: USA MS Stennis Space Center
Additional Work Locations:

Benefits

• 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.

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.

Equal Opportunity Employer

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans Opportunity Owned From working with technologies like AI, cyber and cloud to careers in intelligence and health, we offer endless opportunities to apply your expertise to create a safer, smarter world.