Top 129 Sr Unix Administrator Jobs

Senior Systems Administrator
General Dynamics Information Technology —Fort Huachuca, AZ
- $147,292 - $199,278 a year
- Travel
- Training & development
- Senior level
- Paid time off
- 401(k) matching
Sr. Principal Computer Systems Analyst - Linux
Northrop Grumman —Baltimore, MD
- $123,400 - $185,000 a year
- Overtime
- Azure
- 6 years
- Windows
- Paid holidays
- Disability insurance
Sr Principal Linux Systems Administrator - Secret
Northrop Grumman —Boulder, CO
- $129,300 - $193,900 a year
- Overtime
- 6 years
- System design
- Master's degree
- Paid holidays
- Disability insurance
10d
Sr. Splunk Administrator
Mican Technologies —Remote
- Remote
- Azure
- Windows
- Java
Systems Administrator - Jr, Mid, Sr
SRC Technologies —Fort Meade, MD
- Mid-level
- Windows
- Scripting
Sr. Systems Administrator
BCCUSA-MA —Norwood, MA
- Computer science
- Computer Science
- Windows
Senior Linux/UNIX System Administrator
GCUBED ENTERPRISES INC —Patrick Space Force Base, FL
- $75,000 - $90,000 a year
- 5 years
- Scripting
- Senior level
Quick Apply
Senior Unix Administrator
Shivam Infotech —Somerset, NJ
- Email
- 5 years
- Master's degree
- Senior level
Sr. Unix Systems Administrator
Amyx, Inc. —Oklahoma City, OK
- Full-time
- Windows
- JavaScript
- Ability to sit for extended periods
- Wellness program
- Health savings account
8d
Senior UNIX Systems Administrator (Solaris)
CybeCys —Plano, TX
- Full-time
- Office
- 8 years
- Mentoring
Senior Unix Administrator
IrisLogic Inc. —Santa Clara, CA
- Computer Science
- 5 years
- Senior level
Sr. System Administrator
Financial Partners Credit Union —Costa Mesa, CA
- $115,763 - $162,200 a year
- Computer science
- Computer Science
- Research
Quick Apply
Sr. System Administrator
Power3 Solutions —Fort Meade, MD
- 3 years
- Analysis skills
- Bachelor's degree
- Health insurance
- Dental insurance
Senior Systems Administrator
PingWind —Remote
- Full-time
- Remote
- 7 years
- Azure
- System design
- AD&D insurance
- Paid holidays
Quick Apply
Senior WebLogic Administrator
Global IT Solutions USI —Woonsocket, RI
- On call
- Windows
- Analysis skills
- US work authorization
Sr.Network and System Administrator
Galaxy Software Solutions —Canton, MI
- $1 - $3 an hour
- Oracle
- Management
- Computer Science
Senior System Administrator
University Health - San Antonio —San Antonio, TX
- $34.25 - $58.29 an hour
- Full-time
- Computer science
- 6 years
- Computer Science
Systems Sr Administrator (IT)
DAVITA —Denver, CO
- $78,000 - $119,000 a year
- Full-time
- Azure
- DevOps
- AWS
- Health insurance
- Dental insurance
Sr. System Administrator
Hampton Roads Transit —Norfolk, VA
- $85,409 - $111,031 a year
- Full-time
- Azure
- Computer Science
- Writing skills
Entry Level to Senior Level UNIX & Network Administrators
ISoftech —Chantilly, VA
- Windows
- Java
- JavaScript

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Senior Systems Administrator

General Dynamics Information Technology -
Fort Huachuca, AZ

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Job Details

$147,292 - $199,278 a year

Benefits

Internal mobility program
Paid time off
401(k) matching

Qualifications

Security Authorization
Implementing network security protocols
Network documentation
Vulnerability scanning implementation
Telecommunications network configuration documentation
IT user and group management
Linux support
Telecommunications network performance monitoring
Procedural guides
Technical documentation
Security system forensics
IT system monitoring
IT strategy planning
Process improvement
Server backup and recovery
Operating system updates
Software installation
User training (technical support)
Patch management
Desktop (troubleshooting support)
Network protocols
Virtualization
Compliance documentation
Fiber optic systems installation
Customer support ticket management
Data access controls implementation
WAN
Contingency planning
Server virtualization
Networking equipment (troubleshooting support)

Full Job Description

Your Impact

Own your opportunity to support our nation's defense. Make an impact by connecting and securing critical operations across the globe, keeping our country safe and secure.

Job Description

Senior Systems Administrator

Overview:

The Senior Systems Administrator supports the U.S. Army Information Systems Engineering Command (USAISEC), Communications Security Directorate (CSD), by providing comprehensive enterprise-level system, network, and workstation administration services across classified and unclassified environments. This role ensures the availability, security, continuity, and performance of all CSD-managed IT systems, user endpoints, network infrastructure, and supporting technologies.

Job Duties:

Administer, update, and maintain physical and virtual Windows, Linux, UNIX, and Active Directory servers.
Install, configure, and sustain system and application software, patches, and updates.
Monitor system performance and resolve operational issues.
Manage support tickets with vendors and Government partners and coordinate warranty actions.
Provide daily end‑user technical support for workstations, peripherals, and communication devices.
Deploy and maintain workstations and associated hardware.
Create and manage user accounts across classified and unclassified networks.
Troubleshoot hardware, software, and connectivity issues.
Deliver user training on core operating systems and software tools.
Issue outage notifications for planned and unplanned service events.
Serve as Key Management Infrastructure (KMI) Client Platform Administrator.
Configure and maintain LAN/WAN devices including routers, switches, encryptors, and firewalls.
Monitor network uptime, traffic, and performance.
Install, test, and maintain copper and fiber cabling, resolving physical and logical network issues.
Document cabling, port assignments, and network configurations.
Enforce cybersecurity policies in alignment with Army, DOW, and RMF requirements.
Manage domains, permissions, privileged accounts, and access controls.
Support RMF and ATO processes through system documentation and compliance artifacts.
Run vulnerability scans, validate security controls, and support continuous monitoring.
Respond to security incidents, malware events, and classified spillage.
Isolate affected systems, preserve evidence, and support remediation activities.
Execute and verify daily system backups.
Transport classified backup media to off‑site secure facilities as required.
Maintain and test contingency and disaster recovery plans.
Prepare for outages, hardware failures, and service disruptions.
Support long‑term IT planning and lifecycle replacement strategies.
Evaluate and recommend emerging technologies.
Participate in technical boards, working groups, and governance activities.
Prepare and deliver technical briefings and analysis.
Support system testing, including scenario‑based and configuration‑based evaluations.
Maintain system documentation, SOPs, and troubleshooting guides.
Ensure documentation supports rapid onboarding of new personnel.
Improve tools, processes, and procedures as directed by leadership.

WHAT YOU’LL NEED TO SUCCEED
Bring your technology expertise and drive for innovation to GDIT. The Systems Administrator SME must have:

Education: At least 2 Certifications within the following disciplines: Systems and network administration, Operating systems, Server Virtualization, Videoconferencing, Fiber optic cabling, Audio/visual systems, Network and systems management and control, Media access/digital interfaces, Voice over Internet Protocol (VoIP), and/or System and/or network protocols

Experience: 10+ years of related experience
Must meet DoD 8140 Cyber Workforce Qualification Program requirements for System Administrator (DCWF 451), Intermediate level
US citizenship required

Security clearance level: TOP SECRET

Location: Fort Huachuca, AZ

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, and competitive pay and paid time off
Flexibility: Full-flex work week to own your priorities at work
Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY
Explore an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

Work Requirements

Years of Experience

10 + years of related experience

may vary based on technical training, certification(s), or degree

Certification

Travel Required

Less than 10%

Citizenship

U.S. Citizenship Required

Salary and Benefit Information

The likely salary range for this position is $147,292 - $199,278. 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.
View information about benefits and our total rewards program.

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 at gdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Apply Now

Refine Your Search

Sr Unix Administrator jobs

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Entry Level to Senior Level UNIX & Network Administrators

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