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Linux Security Jobs (NOW HIRING)

ISHIR

Linux Systems Administrator

Killeen, TX · On-site

Manage Linux security administration in collaboration with information security teams. * Monitor system health, performance, availability, and capacity, and proactively address potential issues.

ISHIR

Linux Systems Administrator

Killeen, TX

Manage Linux security administration in collaboration with information security teams. * Monitor system health, performance, availability, and capacity, and proactively address potential issues.

ATS

Be Seen First

Linux System Admin

Dallas, TX · Remote

$100K - $110K/yr

Maintain Guest OS security requirements in cloud including OS patching, fix known security vulnerabilities, OS hardening and security compliance * Good understanding of Linux security modules SELinux ...

ISHIR

Linux Systems Administrator

Killeen, TX · On-site

Manage Linux security administration in collaboration with information security teams. * Monitor system health, performance, availability, and capacity, and proactively address potential issues.

Verkada

Embedded Linux Security Engineer

San Mateo, CA · On-site

Deep knowledge of Linux-based operating system internals & network protocols. * Knowledge of hardware security features such as secure boot, TrustZone, disk encryption, or mandatory access control.

Castello Systems, Inc.

Mitigate STIGS/Vulnerabilities on Tenable Linux Security Center Servers and Windows/Linux Nessus Scanning Servers. * Install and update Tenable Nessus Software on Linux/Windows Scanning Servers.

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Linux Security information

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How much do linux security jobs pay per hour?

As of Sep 14, 2026, the average hourly pay for linux security in the United States is $48.08, according to ZipRecruiter salary data. Most workers in this role earn between $48.08 and $48.08 per hour, depending on experience, location, and employer.

What is Linux Security?

Linux Security refers to the set of practices, tools, and configurations used to protect Linux operating systems from unauthorized access, vulnerabilities, malware, and other cyber threats. It involves managing user permissions, configuring firewalls, applying security patches, and monitoring system activity. Linux security professionals also implement measures such as SELinux, AppArmor, and intrusion detection systems to safeguard data and maintain system integrity.

What are the key skills and qualifications needed to thrive in a Linux Security role?

To thrive in a Linux Security role, you need a solid understanding of Linux operating systems, cybersecurity principles, and network security, often supported by a degree in computer science or a related field. Familiarity with tools such as SELinux, iptables, intrusion detection systems (e.g., Snort), and certifications like CompTIA Security+ or Red Hat Certified Engineer (RHCE) is highly valuable. Strong analytical thinking, attention to detail, and effective communication are essential soft skills for identifying threats and working collaboratively. These skills and qualifications are crucial for proactively protecting systems, mitigating risks, and maintaining a secure IT environment.

What are some common challenges faced by professionals in Linux Security roles, and how can they be addressed?

Professionals in Linux Security often face challenges such as keeping systems up-to-date against emerging vulnerabilities, managing user permissions securely, and ensuring compliance with security policies across diverse environments. Regular patch management, proactive monitoring, and automation tools are essential for addressing these issues effectively. Additionally, strong collaboration with system administrators and DevOps teams helps streamline incident response and maintain a secure infrastructure.

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

AspectLinux SecurityLinux System Administrator
CertificationsCompTIA Security+, Linux Security CertificationsCompTIA Linux+, LPIC-1, Linux+
Work EnvironmentFocus on security protocols, vulnerability management, and threat mitigationManage overall system setup, maintenance, user management, and performance
Employer & Industry UsageCybersecurity firms, IT security teams, organizations with high security needsIT departments, hosting providers, enterprise environments

Linux Security specialists focus on protecting Linux systems from threats, implementing security measures, and managing vulnerabilities. Linux System Administrators handle the broader management of Linux systems, including installation, configuration, and maintenance. While both roles require Linux knowledge, Linux Security emphasizes security-specific skills, whereas Linux System Administration covers overall system management.

Are Linux Security jobs in demand?

Linux Security jobs are in high demand due to the widespread use of Linux in servers, cloud infrastructure, and cybersecurity. Professionals with skills in Linux system administration, security protocols, and certifications like CompTIA Linux+ or CISSP are sought after by organizations to protect their networks and data.
More about Linux Security jobs

What are the most commonly searched types of Linux Security jobs?

The most popular types of Linux Security jobs are:

What states have the most Linux Security jobs?

States with the most job openings for Linux Security jobs include:

What job categories do people searching Linux Security jobs look for?

The top searched job categories for Linux Security jobs are:

What other helpful pages are available for Linux Security?

Other pages related to Linux Security:

Linux Security jobs near you
Infographic showing various Linux Security job openings in the United States as of September 2026, with employment types broken down into 84% Full Time, 14% Part Time, and 2% Contract. Highlights an 89% Physical, 2% Hybrid, and 9% Remote job distribution, with an average salary of $100,000 per year, or $48.1 per hour.

Linux Systems Administrator

Killeen, TX • On-site

ISHIR
IT Services • 51 - 200 employees
Learn more about ISHIRexternal

Other

This job post has expired today. Applications are no longer accepted.

Job description

Linux Systems Administrator

Job Type: Full-Time
Location: Killeen, Texas
Department: Systems Support

Job Summary

We are looking for an experienced Linux Systems Administrator to administer, monitor, secure, and maintain enterprise Linux environments. The ideal candidate will have strong hands-on experience with RHEL, Ubuntu, and CentOS, along with familiarity with Windows Server, VMware, and containerized environments such as OpenShift and Kubernetes.

This role will provide Tier 2/3 technical support, troubleshoot complex infrastructure issues, support enterprise applications, and collaborate closely with development, DevOps, and security teams.

Key Responsibilities
  • Administer, monitor, maintain, and troubleshoot Linux systems, including RHEL, Ubuntu, and CentOS.
  • Install, configure, secure, and optimize Linux services such as systemd, SSH, Apache/Nginx, cron, and related services.
  • Perform Linux system upgrades, patching, configuration, and security hardening.
  • Provide Tier 2/3 support for escalated server and infrastructure issues.
  • Identify, research, and implement Linux and OpenShift solutions and applications.
  • Support and troubleshoot enterprise applications and their underlying server environments.
  • Manage Linux security administration in collaboration with information security teams.
  • Monitor system health, performance, availability, and capacity, and proactively address potential issues.
  • Collaborate with development, DevOps, infrastructure, and security teams to support application and infrastructure requirements.
  • Provide technical guidance and support to IT teams on Linux configuration and administration.
  • Maintain awareness of Linux and OpenShift updates, changes, and new releases, and communicate relevant changes to stakeholders.
  • Work with vendors and internal teams to resolve technical issues and support applications and infrastructure.
  • Create and maintain accurate technical documentation, processes, and standard operating procedures.
  • Participate in a weekly on-call rotation to respond to after-hours infrastructure issues.
  • Travel to other data centers or company locations as required.
  • Perform other duties and assignments as needed.
Windows Server & Virtualization
  • Provide administration and support for Windows Server environments and related services.
  • Working knowledge of Active Directory, Group Policy, DNS, DHCP, and PowerShell.
  • Administer VMware vSphere/ESXi environments, including:
    • Virtual machine deployment
    • Resource management
    • VM administration
    • Snapshots
    • Basic troubleshooting
OpenShift & Containerization
  • Support and administer OpenShift/Kubernetes environments.
  • Install, configure, maintain, upgrade, monitor, and troubleshoot OpenShift/Kubernetes clusters.
  • Support containerized applications using OpenShift, Kubernetes, or Docker.
  • Stay current with developments, updates, and best practices in container orchestration technologies.
Security & Compliance
  • Ensure compliance with security standards, patching schedules, and organizational policies.
  • Apply security hardening practices to Linux and server environments.
  • Understand common web application and infrastructure vulnerabilities, risks, and appropriate countermeasures.
  • Work closely with security teams to identify and remediate security issues.
  • Maintain confidentiality of sensitive customer, business, and internal information.
Required Qualifications & Skills
  • Bachelor's degree in Computer Science, Computer Engineering, Information Technology, or a related field preferred. Equivalent relevant experience may be considered.
  • Strong hands-on experience administering Linux servers, preferably RHEL, Ubuntu, and/or CentOS.
  • Strong troubleshooting and analytical skills with the ability to independently research and resolve complex technical issues.
  • Experience with Linux system administration, configuration, patching, and security.
  • Knowledge of Windows Server administration and core services.
  • Familiarity with VMware vSphere/ESXi.
  • Knowledge of web/application server technologies such as Apache and Nginx.
  • Understanding of server and web application security principles.
  • Ability to manage multiple priorities and meet project deadlines.
  • Strong written and verbal communication skills.
  • Ability to collaborate effectively with technical and non-technical stakeholders.
  • Ability to work independently as well as part of a broader IT team.
  • Willingness to participate in an on-call rotation.
Preferred Qualifications
  • Experience with OpenShift, Kubernetes, and/or Docker.
  • Experience installing, configuring, upgrading, monitoring, and troubleshooting OpenShift/Kubernetes clusters.
  • Familiarity with CI/CD pipelines, Git, and DevOps practices.
  • Experience with Infrastructure as Code (IaC) tools such as Terraform and Ansible.
  • Experience with monitoring and logging platforms such as Prometheus, Grafana, ELK, or Splunk.
  • Familiarity with Linux security hardening and patch management.
  • Certifications such as RHCSA, RHCE, CKA, CKAD, or OpenShift certifications are a plus.
What We're Looking For

We are looking for someone who is technically strong, security-conscientious, and comfortable working across Linux infrastructure, virtualization, and modern containerized environments. The ideal candidate should be proactive, capable of handling complex production issues, and able to collaborate effectively across IT, DevOps, development, and security teams.

About ISHIR

ISHIR is a digital innovation and enterprise AI services provider. We work with startups and enterprises to shape the future through accelerated innovation, deep technical expertise, access to global digital talent and a passion for complex problem-solving. With our help, our clients overcome their most difficult digital challenges leveraging AI.

We are not just consultants, we are partners in our clients’ success, assisting them with re(gaining) competitive edge by identifying opportunities for differentiation, industry disruption, scalable innovation, and go-to-market strategies that deliver successful outcomes.

At ISHIR, we help bold businesses accelerate innovation through Talent, Speed-to-Market, and AI. We help make an impact by solving real problems using innovation, improved customer experiences and the right technologies.

As an ISHIR employee, you will get the advanced training you need to be successful, and the opportunity to apply it. You must be passionate about technology, crave responsibility, and be eager to apply your knowledge to real business solutions for our startup and enterprise customers. These are the qualities of a person destined for success at ISHIR.

ISHIR attracts a special type of individual—someone who is proactive, thrives on challenges, feeds off success, and looks at moving targets not as obstacles but as opportunities. ISHIR is an exciting place to work. It is imbued with an entrepreneurial spirit and promotes self-reliance, open communication, and collaboration.

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