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Added 1 min ago
Full Stack Engineer - Cloud & On Premise
Syntiant
Redwood City, CA
Coordinate and collaborate with Syntiant cyber security staff.
Added 2 mins ago
Senior Cybersecurity Engineer
Tau Six
Chantilly, VA
…cybersecurity and system integration services to the US National Security market. We have an immediate need for a Senior Cybersecurity Engineer and are seeking a motivated self-starter with…
Added 10 mins ago
Senior Security Engineer - Aerospace
Muon Space
San Jose, CA
Muon seeks a Senior Security Engineer to join our Security Engineering & IT team. The ideal candidate brings deep expertise across multiple security domains and can operate independently to…
Added 21 mins ago
UG
Principal Information Security Engineer
UnitedHealth Group
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- $112,700 to $193,200 USD / year
Plans, conducts, and responds to internal and external cyber security audits and questionnaires; interprets and documents audit results; recommends and implements corrective actions
Added 31 mins ago
Network Engineer
GD Information Technology, Inc.
United States
CERTIFICATIONS: CompTIA Security+ or equivalent
Added 31 mins ago
System Engineer SME
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United States
As the lead/senior systems engineer, performs design of server and application architectures. Performs the administrative operation and maintenance of server hardware and software.…
Added 31 mins ago
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…communication. This role operates in environments where uptime, data security, and regulatory sensitivity (HIPAA, PHI handling, clinical and lab operations) carry real operational weight,…
Added 33 mins ago
Systems Engineer
BAE Systems
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About BAE Systems, Inc.BAE Systems, Inc. is a defense, aerospace, and security company headquartered in Falls Church, Virginia, with more than 40,000 employees worldwide. We serve, supply,…
Added 33 mins ago
FPGA Design Lead
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About BAE Systems, Inc.BAE Systems, Inc. is a defense, aerospace, and security company headquartered in Falls Church, Virginia, with more than 40,000 employees worldwide. We serve, supply,…
Added 33 mins ago
Sr. Principal Systems Engineer II – Staff Systems Engineering Strategic Lead
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About BAE Systems, Inc.BAE Systems, Inc. is a defense, aerospace, and security company headquartered in Falls Church, Virginia, with more than 40,000 employees worldwide. We serve, supply,…
Added 38 mins ago
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We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common…
Added 38 mins ago
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- $255,000 to $295,000 USD / year
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- $195,000 to $235,000 USD / year
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Added 38 mins ago
Sr. SOC Engineer
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Added 38 mins ago
SOC Security Engineer
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Added 38 mins ago
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Quantum Sky is hiring a Cloud Security Engineer (AWS & GCP) to join our team of cloud, security, and compliance experts. This role is primarily focused on day‑to‑day security engineering,…
Added 48 mins ago
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Added 1 hour ago
Senior Specialist, System Administrator (TS/SCI)
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Closed listing

GD Information Technology, Inc.

Linux Systems Engineer

United States

The likely salary range for this position is $110,500 - $149,500.

This opening has closed.

The original listing is kept below for reference.

Find open jobs More jobs with this employer

About employer

Job details

Pay: The likely salary range for this position is $110,500 - $149,500.
Experience: Experience: 5+ years of related experience
Posting language: English
Posted: Nov 3, 2026

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Original job description

Archived listing. The details below describe a past opening.

Type of Requisition:

Regular

Clearance Level Must Currently Possess:

Top Secret

Clearance Level Must Be Able to Obtain:

Top Secret/SCI

Public Trust/Other Required:

None

Job Family:

IT Infrastructure and Operations

Job Qualifications:

Skills:

CentOS, Linux, Linux Server, RedHatCertifications:

NoneExperience:

5 + years of related experienceUS Citizenship Required:

Yes

Job Description:

Advance how our customers operate while you advance your career. Join GDIT as a Senior Linux Systems Engineer and build an impactful career in enterprise IT, collaborating with people who are driven and resourceful like you.

MEANINGFUL WORK AND PERSONAL IMPACT

As a Senior Linux Systems Engineer, the work you’ll do at GDIT will be impactful to the mission of USCENTCOM. You will play a crucial role in configuration, maintenance, and optimization of Linux-based server environments supporting a large-scale enterprise infrastructure. This role supports mission-critical systems across an environment of more than 5,000 users, 1,000 servers, and 10,000 endpoints. The administrator will collaborate closely with other Enterprise Services teams to ensure system availability, performance, security compliance, and operational efficiency in support of USCENTCOM mission requirements.

Duties and Responsibilities

Configure, deploy, and maintain Linux server environments, including physical and virtual systems.
Administer Red Hat and CentOS Linux systems, ensuring stability, performance, and security compliance.
Configure and manage Linux services such as Apache, Nginx, DNS, DHCP, LDAP, and related system services.
Monitor system performance and availability, proactively identifying and resolving issues before they impact operations.
Troubleshoot and resolve complex system issues, including problems without existing documented solutions.
Implement system patches, updates, and security hardening in accordance with DoD and organizational policies.
Manage SSL/TLS certificate lifecycle activities supporting Linux-based services.
Collaborate with infrastructure, network, storage, and security teams to design and implement Linux-based solutions aligned with enterprise requirements.
Participate in system upgrades, migrations, and the deployment of new Linux infrastructure components.
Ensure incidents, problems, and service requests are tracked, prioritized, escalated, and resolved appropriately.
Develop and maintain technical documentation, including system configurations, troubleshooting guides, and standard operating procedures.
Produce reports and data sets to inform leadership of system performance, trends, and improvement opportunities.
Provide technical mentorship and guidance to junior administrators and team members.
Support projects focused on improving the security, efficiency, scalability, and resilience of Linux environments.
Assist in developing and enforcing system policies and best practices.
Participate in enterprise initiatives to modernize and standardize infrastructure services.
Contribute to continuous improvement efforts across Enterprise Services teams.

WHAT YOU’LL NEED TO SUCCEED

Bring your technology expertise and drive for innovation to GDIT. The Systems Administrator Senior must have:

Certification: Applicable DoW 8140 or DoW 8570 Certification
Experience: 5+ years of related experience
Required skills:
Demonstrated proficiency administering Red Hat and CentOS Linux systems in enterprise environments.
Strong experience building, deploying, and maintaining Linux server infrastructures.
Expertise in system performance tuning, availability management, and security hardening.
Experience implementing patches, updates, and configuration changes in controlled environments.
Ability to troubleshoot and resolve complex systems issues under operational constraints.
Strong documentation skills for system configurations, procedures, and troubleshooting guides.
Proven ability to work collaboratively across multiple IT disciplines.
Desired Skills:
Red Hat Certified System Administrator (RHCSA) or higher
ITIL 4 Foundation Certification
Experience supporting USCENTCOM environments and familiarity with mission systems and operational requirements.
Knowledge of enterprise-scale infrastructure operations.
Experience mentoring junior administrators and contributing to team development.
Security clearance level: TS/SCI
US citizenship required

GDIT IS YOUR PLACE

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

Growth: AI-powered career tool that identifies career steps and learning opportunities
Support: An internal mobility team focused on helping you achieve your career goals
Rewards: Comprehensive benefits and wellness packages, 401K with company match, competitive pay and paid time off
Community: Award-winning culture of innovation and a military-friendly workplace

#centcomcits #gditprioity

The likely salary range for this position is $110,500 - $149,500. 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:

Travel Required:

Less than 10%

Telecommuting Options:

Onsite

Work Location:

USA FL MacDill AFB

Additional Work Locations:

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.

Join our Talent Community to stay up to date on our career opportunities and events atgdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

About employer

More about this job

Skills

Linux
IMPACT
Regulatory compliance
DNS
DHCP
LDAP
Monitor system performance
Troubleshoot
Documentation
Troubleshooting
Leadership
Process improvement
ITIL
Coaching
Team building

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