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Linux System Administrator Freelance Jobs in Texas

Cymertek

Linux System Administrator

San Antonio, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Linux System Administrator LOCATION San Antonio, TX 78208 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a dedicated and skilled ...

3B Staffing LLC

Linux System Administrator

Houston, TX · On-site

IT/OT System Administrator - Linux Key Responsibilities: * Install, configure, and maintain Linux and Windows servers and systems across IT and OT networks. * Perform system upgrades, apply security ...

Posted today

3B Staffing LLC

Linux System Administrator

Houston, TX · On-site

IT/OT System Administrator - Linux Key Responsibilities: * Install, configure, and maintain Linux and Windows servers and systems across IT and OT networks. * Perform system upgrades, apply security ...

Posted today

Esolvit Inc

Linux System Administrator

Austin, TX · On-site

Linux System Administrator (#1728) Location: Austin,TX Preferred C2H Requirement Duration: 6+ Months Experience: Senior level Linux engineer Strong experience with RHEL (5, 6, and 7) and Windows AD ...

Set of X

Linux System Administrator

San Antonio, TX · On-site

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Configure, administer, monitor, and maintain Linux operating systems. * Support servers, storage, networks, mobile devices, and other IT infrastructure. * Install, configure, patch, and troubleshoot ...

Set of X

Linux System Administrator

San Antonio, TX · On-site

$110K - $190K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Configure, administer, monitor, and maintain Linux operating systems. * Support servers, storage, networks, mobile devices, and other IT infrastructure. * Install, configure, patch, and troubleshoot ...

MRI Technologies

HPC Linux System Administrator

Houston, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

MRI Technologies has an exciting opportunity for an HPC Linux System Administrator on the JETS II contract at NASA Johnson Space Center. You will support the Flight Sciences Laboratory (FSL), one of ...

MRI Technologies

HPC Linux System Administrator

Houston, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

MRI Technologies has an exciting opportunity for an HPC Linux System Administrator on the JETS II contract at NASA Johnson Space Center. You will support the Flight Sciences Laboratory (FSL), one of ...

MRI Technologies

HPC Linux System Administrator

Houston, TX

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

MRI Technologies has an exciting opportunity for an HPC Linux System Administrator on the JETS II contract at NASA Johnson Space Center. You will support the Flight Sciences Laboratory (FSL), one of ...

Amentum

HPC Linux System Administrator

Houston, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We have an exciting opportunity for a HPC Linux System Administrator to join the team with MRI, a teammate company. Requisition Description: Are you excited about supporting NASA human spaceflight?

Mclaurin Aerospace

HPC Linux System Administrator

Houston, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We have an exciting opportunity for a HPC Linux System Administrator to join our JETS II contract team at NASA Johnson Space Center in Houston, TX . If selected you will: * The FSL is one of JSC ...

Mclaurin Aerospace

HPC Linux System Administrator

Houston, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We have an exciting opportunity for a HPC Linux System Administrator to join our JETS II contract team at NASA Johnson Space Center in Houston, TX . If selected you will: * The FSL is one of JSC ...

Mclaurin Aerospace

HPC Linux System Administrator

Houston, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We have an exciting opportunity for a HPC Linux System Administrator to join our JETS II contract team at NASA Johnson Space Center in Houston, TX . If selected you will: * The FSL is one of JSC ...

MRI Technologies

HPC Linux System Administrator

Houston, TX · On-site

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

MRI Technologies has an exciting opportunity for an HPC Linux System Administrator on the JETS II contract at NASA Johnson Space Center. You will support the Flight Sciences Laboratory (FSL), one of ...

Esolvit Inc

Linux System Administrator

Austin, TX · On-site

Senior level Linux engineer Strong experience with RHEL (5, 6, and 7) and Windows AD Experience ... and system standardization Scripting experience required, prefer BASH, Python, Perl, etc.

Pae

HPC Linux System Administrator

Houston, TX

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We have an exciting opportunity for a HPC Linux System Administrator to join the team with MRI, a teammate company. Requisition Description: Are you excited about supporting NASA human spaceflight?

Avcend

Linux System Admin

Plano, TX · On-site

* We are seeking a skilled and experienced System Administrator to join our team to manage and support our Linux-based private cloud infrastructure. Ideal candidate to ensure the stability, integrity ...

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All JobsLinux System Administrator JobsLinux System Administrator Freelance JobsLinux System Administrator Freelance Jobs in Texas

Linux System Administrator Freelance information

See Texas salary details

$19

$48

$70

How much do linux system administrator freelance jobs pay per hour?

As of Aug 12, 2026, the average hourly pay for linux system administrator freelance in Texas is $48.41, according to ZipRecruiter salary data. Most workers in this role earn between $38.32 and $58.22 per hour, depending on experience, location, and employer.

What does a freelance Linux system administrator do?

Linxus is a software system that provides an area to develop and run applications related to the security of technology information. As a freelance Linux system administrator, you work under contract and have responsibilities that cover the entire process. Your duties include designing the infrastructure, implementing new programs and updates, monitoring the network, ensuring the platform is compatible with user equipment, and collaborating with others on system strategies. A freelance administrator can work from home or travel to a business until the project is complete.

What does a freelance Linux system administrator do?

A freelance Linux System Administrator is an IT professional who manages, configures, and maintains Linux-based servers and systems for clients on a contract or project basis. Their responsibilities include installing software, monitoring system performance, ensuring security, troubleshooting issues, and performing regular backups. Working as a freelancer, they often support multiple clients remotely, providing flexible and specialized Linux administration services tailored to different business needs.

What are some common challenges faced by freelance Linux system administrators when managing multiple clients?

Freelance Linux System Administrators often juggle several clients at once, each with their own unique systems, security policies, and expectations. This can make it challenging to prioritize tasks, keep documentation organized, and ensure all environments are secure and up-to-date. Effective time management, clear communication, and robust tracking tools are essential for staying on top of updates, troubleshooting requests, and coordinating with client teams. Additionally, freelancers need to be proactive in learning about new technologies and best practices to offer valuable, up-to-date solutions.

What are the key skills and qualifications needed to thrive as a freelance Linux system administrator?

A successful Linux System Administrator Freelance should have strong expertise in Linux operating systems, networking, scripting (such as Bash or Python), and a solid understanding of server security, often supported by a degree in computer science or relevant certifications like RHCSA or CompTIA Linux+. Familiarity with tools such as Ansible, Docker, and cloud platforms (AWS, Azure) is typically required for managing and automating systems. Excellent problem-solving skills, communication, and the ability to work independently are crucial soft skills for freelancers. These competencies ensure reliable system performance, client satisfaction, and the ability to adapt to diverse technical environments.

What is the difference between Linux System Administrator Freelance vs Linux System Administrator?

AspectLinux System Administrator FreelanceLinux System Administrator
CredentialsCertifications like Linux+, RHCSA, or LPIC often preferred; self-taught skills also commonSimilar certifications required; often employed with companies or government agencies
Work EnvironmentRemote, flexible projects for multiple clientsTypically in-house or remote with a single employer
Employer & IndustryIndependent contractors serving various industriesFull-time employee in IT or tech departments
Work ScopeProject-based, varied tasks, client-specificOngoing system management, maintenance, and support

In summary, a Linux System Administrator Freelance works independently on diverse projects for multiple clients, often remotely, while a Linux System Administrator employed by a company handles ongoing system management within a fixed organization. Both roles require similar certifications and technical skills but differ mainly in work environment and scope.

More about Linux System Administrator Freelance jobs
What are the most commonly searched types of Linux System Administrator jobs in Texas? The most popular types of Linux System Administrator jobs in Texas are:
What are popular job titles related to Linux System Administrator Freelance jobs in Texas? For Linux System Administrator Freelance jobs in Texas, the most frequently searched job titles are:
What job categories do people searching Linux System Administrator Freelance jobs in Texas look for? The top searched job categories for Linux System Administrator Freelance jobs in Texas are:
What cities in Texas are hiring for Linux System Administrator Freelance jobs? Cities in Texas with the most Linux System Administrator Freelance job openings:
Linux System Administrator Freelance jobs near you
Infographic showing various Linux System Administrator Freelance job openings in Texas as of July 2026, with employment types broken down into 86% Full Time, 5% Part Time, and 9% Contract. Highlights an 95% In-person, and 5% Remote job distribution, with an average salary of $100,692 per year, or $48.4 per hour.

Linux System Administrator

Cymertek

San Antonio, TX • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 21 days ago

Job description

Linux System Administrator
LOCATION
San Antonio, TX 78208
CLEARANCE
TS/SCI Full Poly (Please note this position requires full U.S. Citizenship)
KEY SUMMARY
We are looking for a dedicated and skilled Linux Systems Administrator to join our team and play a vital role in managing and maintaining our Linux-based infrastructure. In this position, you will be responsible for deploying, configuring, monitoring, and troubleshooting Linux servers to ensure optimal performance, reliability, and security. You will collaborate with cross-functional teams to support system integration, implement automation solutions, and enhance system scalability. If you have a passion for Linux systems, a proactive approach to problem-solving, and a commitment to delivering high-quality support, we invite you to apply and help us drive our technical operations forward.
*** Please note that our job openings are dynamic and can open or close quickly (much faster than we can publish). If you do not see an opening you are looking for, know that we see almost all types of positons. We strive to keep our listings up to date, but please consider submitting your current resume. Our team will work with you to identify the most recent opportunities that align with your skillset and career goals. We look forward to you joining our family. ***
SIMILAR CAREER TITLES
Linux Administrator, Systems Administrator, DevOps Engineer, Unix Administrator, IT Systems Engineer, Infrastructure Engineer, Cloud Systems Administrator, Server Administrator, Network Systems Administrator, etc.
DEGREE (Level Desired)
Bachelor's Degree
DEGREE (Focus)
Computer Science, Information Technology, Cybersecurity, Network Engineering, Systems Engineering, Information Systems, Software Engineering, Computer Engineering, Data Science, etc.
ALTERNATE EXPERIENCE
General comment on degrees: Most contracts allow additional experience (4-5 years) in lieu of a Bachelor's Degree. Some contracts give 4-5 years experience credit for a Bachelor's Degree. Some contracts give 2 years experience credit for a Master's Degree. We will work with you to find the right fit.
POSITION RESPONSIBILITIES
  • Install, configure, and maintain Linux servers
  • Monitor system performance and ensure uptime
  • Manage user accounts and permissions
  • Troubleshoot and resolve server issues
  • Implement and maintain security updates
  • Create and maintain system documentation

REQUIRED SKILLS
  • Proficiency with Linux command-line tools
  • Experience with shell scripting
  • Knowledge of server virtualization
  • Familiarity with configuration management tools
  • Understanding of file systems and storage
  • Ability to monitor system logs effectively

DESIRED SKILLS
  • Knowledge of cloud platforms (e.g., AWS, Azure)
  • Experience with containerization tools (e.g., Docker)
  • Familiarity with CI/CD pipelines
  • Understanding of network protocols (e.g., TCP/IP)
  • Knowledge of security hardening practices
  • Experience with high-availability environments

PLUG IN to CYMERTEK - And design your future...
YOUR FOREVER CAREER STARTS HERE
Are you looking for more than just a job? Join a company where employees are treated like family, and your career is built to last. We are a growing small business and a trusted federal contractor offering full scope consulting services in information technology, cybersecurity, and analyst workforce development.
At our company, you come first. We're committed to creating an environment where you'll thrive professionally and personally. We provide meaningful, challenging work using cutting-edge technologies while investing in your growth and success. With direct access to company leadership, a laid-back and inclusive atmosphere, and exceptional work-life balance, you'll feel valued every day.
We also believe in taking care of our family - both yours and ours. Our benefits are phenomenal, family-friendly, and designed with your well-being in mind. From employee and family events to career-long support, we create a community you'll never want to leave.
Ready to make your next move the best one? Join us and experience the difference.
BENEFITS
  • Excellent Salaries
  • Flexible Work Schedule
  • Cafeteria Style Benefits
  • 10% - 401k Matching (Vested Immediately)
  • Additional 401k Profit Sharing
  • 30 days Paid Leave/Holiday (No Use or Lose!)
  • The day off for your birthday
  • Medical/Dental/Vision - 100% employee coverage. ($1200 allowance - or a bonus)
  • HSA/FSA
  • AFLAC
  • Long Term/Short Term Disability - 100% employee coverage. No cost to you.
  • Life Insurance - 100% employee coverage. No cost to you.
  • Additional Discretionary Life Insurance
  • Paid Training
  • No long, wordy reviews with tons of paperwork!!!
  • Referral bonus program with recurring annual payments

HOW TO APPLY
Email us atjobs@cymertek.comor apply today:www.cymertek.com
Want to see what our employees think? Clickhere .
EQUAL OPPORTUNITY EMPLOYER STATEMENT
Cymertek is proud to be an Equal Opportunity Employer committed to fostering an inclusive and diverse workplace. We embrace and celebrate differences in our employees, recognizing that a diverse workforce enhances our creativity, innovation, and overall success. At Cymertek, employment decisions are made based on merit, qualifications, and business needs without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other characteristic protected by applicable laws. We believe in creating an environment where all individuals are treated with respect and dignity, and where opportunities for professional growth and advancement are accessible to everyone, regardless of background or identity.

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