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Senior Linux System Administrator Jobs (NOW HIRING)

MANTECH

Senior Linux System Administrator

Laurel, MD · On-site

MANTECH seeks a motivated, career and customer-oriented Linux System Administrator to join our team in Laurel, MD. You will be part of a dedicated team delivering enterprise infrastructure ...

ManTech

Senior Linux System Administrator

Laurel, MD

$128K - $214K/yr

ManTech seeks a motivated, career and customer-oriented Linux System Administrator to join our team in Laurel, MD. You will be part of a dedicated team delivering enterprise infrastructure ...

ManTech

Senior Linux System Administrator

Laurel, MD

$128K - $214K/yr

MANTECH seeks a motivated, career and customer-oriented Linux System Administrator to join our team in Laurel, MD. You will be part of a dedicated team delivering enterprise infrastructure ...

Parsons

Senior Linux System Administrator

Aberdeen, MD · On-site

$134K - $241K/yr

Parsons is looking for a talented Linux Systems Administrator to join a tight-knit team keeping powerful, large-scale HPC systems healthy and secure. Your work will help enable cutting-edge research ...

GDIT

Linux Systems Administrator

Concord, NC

Join GDIT as a Senior Linux Systems Administrator and build an impactful career in enterprise IT, collaborating with people who are driven and resourceful like you. MEANINGFUL WORK AND PERSONAL ...

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

As of Jul 16, 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 July 2026, with employment types broken down into 1% As Needed, 85% Full Time, 11% Part Time, 1% Temporary, and 2% Contract. 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

Other

Posted 7 days ago

ManTech rating

9.0

Company rating: 9.0 out of 10

Based on 14 frontline employees who took The Breakroom Quiz

30th of 209 rated software companies

Job description

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

You will be part of a dedicated team delivering enterprise infrastructure capabilities for a global workforce that supports a wide range of national defense missions. This role directly supports the Enterprise Infrastructure Services (EIS) organization—the foundation of all Enterprise Information Technology (EIT) for MPO.

Responsibilities include but are not limited to: 

  • Configure, manage and troubleshoot Linux operating systems.  Installs/loads operating system software, troubleshoot and maintain integrity and configure network components along with implementing operating systems enhancements to improve reliability and performance. 
  • Provides support for implementation, troubleshooting and maintenance of Information Technology (IT) systems. 
  • Manage IT system infrastructure and any processes related to these systems. 
  • Provide support to IT systems including day-to-day operations, monitoring and problem resolution for all the client/server/storage/network devices, mobile devices, etc. 
  • Provide support for the dispatch system and hardware problems and will remain involved in the resolution process. 
  • Optimize system operations and resource utilization and perform system capacity analysis and planning. 
  • Analyze and resolve complex problems associated with server hardware, applications and software integration.

 Minimum Qualifications:

  • Bachelor’s degree in a technical discipline with 12+ years of experience as a Systems Administrator OR 15 years and an associate’s degree OR 20 years of experience and a high school diploma.

  • Demonstrated experience in planning and leading Systems Engineering efforts is required.
  • Must be proficient with troubleshooting in a Linux Red Hat environment.  
  • Extensive experience with VMWare 
  • Demonstrated experience with modern automation/configuration tools such as Splunk or Ansible 
  • IAT I certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include A+ CE/CCNA-Security/CND/Network+ CE /CySA+/GICSP/GSEC/Security+ CE/CND/SSCP) 

Preferred Qualifications:

  • Experience/familiarization with full lifecycle management of Linux systems, to include provisioning, configuration management and patching. 
  • Red Hat Certified System Administration Certification. 
  • Experience with NetAPP 

Clearance Requirements:

  • Active TS/SCI with Polygraph 

Physical Requirements:

  • The person in this position must be able to remain in a stationary position 50% of the time. 
  • Occasionally move about inside the office to collaborate with other leaders/teams, use standard office automation equipment, and virtual communication. 

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