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Senior Linux System Administrator Jobs (NOW HIRING)

ManTech

Senior Linux System Administrator

Laurel, MD · On-site

$128K - $214K/yr

MANTECH seeks a motivated, career-driven, and customer-focused Senior Linux and VMWare System Administrator to join our team in Laurel, MD . This position supports the high-visibility Enterprise ...

ManTech

Senior Linux System Administrator

Laurel, MD · On-site

$128K - $214K/yr

MANTECH seeks a motivated, career-driven, and customer-focused Senior Linux and VMWare System Administrator to join our team in Laurel, MD . This position supports the high-visibility Enterprise ...

i3

Senior Linux System Administrator

Huntsville, AL

Overview i3 is looking for an experienced Senior Linux System Administrator to join our team. In this role, you'll be the go-to person for keeping our mission-critical Linux systems secure, stable ...

Parsons

OR · On-site

$134K - $241K/yr

Parsons is looking for an amazingly talented Senior Linux Systems Administrator to join our team! What You'll Be Doing: * Support the system administration for ARL high performance computers

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How much do senior linux system administrator jobs pay per year?

As of Jun 6, 2026, the average yearly pay for senior linux system administrator in the United States is $127,228.00, according to ZipRecruiter salary data. Most workers in this role earn between $107,000.00 and $150,000.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in the Senior Linux System Administrator position, and why are they important?

To thrive as a Senior Linux System Administrator, you need deep expertise in Linux/UNIX system administration, scripting, networking, and troubleshooting, typically backed by several years of industry experience and a relevant degree or certifications like RHCE or CompTIA Linux+. Proficiency with tools such as Ansible, Puppet, Docker, and monitoring platforms, as well as experience with cloud environments, is highly valued. Strong problem-solving abilities, communication skills, and the capacity to mentor junior team members are crucial soft skills. These abilities are essential for ensuring reliable system uptime, seamless team collaboration, and effective response to complex IT challenges.

What is a Senior Linux System Administrator job?

A Senior Linux System Administrator is responsible for managing, configuring, and maintaining Linux-based systems and servers. They handle system performance tuning, security hardening, troubleshooting, and automation through scripting and configuration management tools. Additionally, they oversee backups, software updates, and infrastructure reliability. This role often involves mentoring junior administrators and collaborating with development and IT teams to support business operations.

What are typical daily responsibilities for a Senior Linux System Administrator?

Senior Linux System Administrators are responsible for managing, maintaining, and optimizing Linux-based servers and infrastructure. Their daily tasks often include monitoring system performance, managing user permissions, applying security patches, automating processes through scripting, and troubleshooting technical issues. They regularly collaborate with developer, security, and operations teams to support new deployments and ensure system reliability. Additionally, they may mentor junior administrators and contribute to designing infrastructure improvements, making this a dynamic and influential role within IT operations.

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Senior Linux System Administrator jobs near you
Infographic showing various Senior Linux System Administrator job openings in the United States as of May 2026, with employment types broken down into 1% As Needed, 51% Full Time, 38% Part Time, 7% Contract, and 3% Nights. Highlights an 93% Physical, 2% Hybrid, and 5% Remote job distribution, with an average salary of $127,228 per year, or $61.2 per hour.
Senior Linux System Administrator

Senior Linux System Administrator

ManTech

Laurel, MD • On-site

$128K - $214K/yr

Other

Medical, Life, Retirement, PTO

Posted 26 days ago

ManTech rating

8.8

Company rating: 8.8 out of 10

Based on 13 frontline employees who took The Breakroom Quiz

31st of 186 rated software companies

Job description

Description & Requirements
Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now-unleash your potential with MANTECH!

MANTECH seeks a motivated, career-driven, and customer-focused Senior Linux and VMWare System Administrator to join our team in Laurel, MD.

This position supports the high-visibility Enterprise Infrastructure Services (EIS) organization, responsible for the delivery and security of MPO's Enterprise Information Technology (EIT), the foundation for enterprise-wide services. As a Senior System Administrator, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services.

Responsibilities include, but are not limited to:

  • Provide Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis, and resolution of problems.
  • Provide support to IT systems including day-to-day operations, monitoring & problem resolution for all the client/server/storage/network devices, etc.
  • Configure and manage Linux, and possibly Windows operating systems, installs/loads operating system software and patches to maintain security compliance, troubleshoot, maintain integrity of and configure network components, along with implementing operating system enhancements to improve reliability & performance.
  • Patching and updating Linux distributions regarding security findings.
  • Adding / Removing users and setting permissions to meet certain user privileges.
  • Working with STIGs and fixing/updating vulnerabilities with STE/STN findings.
  • Renew Linux server certificates and applying updates to TLS security versions.
  • Working with automation software such as ANSIBLE to streamline updates and patching.

Minimum Qualifications:

  • Bachelor's degree with 12+ years of relevant System Administration experience OR Associates degree with 15 years of relevant System Administration experience
  • Senior level Linux Systems Administration experience is required
  • Experience with VMWARE, vSphere, VCF (VMware Cloud Foundations)
  • Server and Hardware maintenance
  • Knowledge of patching & updating Linux distributions regarding security findings.

Preferred Qualifications:

  • 20 years of relevant System Administration experience (no degree requirement)
  • Experience with Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis, and resolution of problems.
  • Experience with monitoring tools like NAGIOS.

Clearance Requirements:

  • Must possess and maintain a current/active TS/SCI clearance with Polygraph
     

Physical Requirements:

  • Must be able to remain in a stationary position 50% of the time
  • Occasionally moves about inside the office to access file cabinets, office machinery, etc.
  • Frequently communicate with co-workers, management, and customers, including delivering presentations. Must be able to exchange accurate information in these situations

The projected compensation range for this position is $128,000.00-$214,400.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.  In addition, MANTECH invests in its employees beyond just compensation.  MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.
If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.

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