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Linux Systems Engineer

Agile Defense, LLC
vision insurance, paid holidays, 401(k)
United States, Alabama, Huntsville
Oct 14, 2025
At Agile Defense we know that action defines the outcome and new challenges require new solutions. That's why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next.
Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility-leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation's vital interests.
Requisition: 1240
Job Title: Linux Systems Engineer
Location: Pocatello ID, Clarksburg WV, or Huntsville AL (on site 5x per week)
Clearance Level: Active TS Required, must be able to maintain CI Polygraph
Summary
Agile Defense is an award-winning national security company looking for a Linux Systems Engineer to support a federal agency by engineering, designing, integrating, deploying, testing, certificating, patching, and addressing interoperability issues, not only of the base operating system (Linux based systems - Red Hat Linux, Solaris, SuSE, CentOS, Oracle Linux, and z/OS), but for all support libraries, components and application dependencies, etc. to meet the needs and support the missions of the agency.
As a direct employee of Agile Defense, you would receive a benefit package that includes health/dental/vision insurance coverage, 401K with company match, PTO & paid holidays, and annual tuition/training assistance. For more information, please visit our website.
Required Responsibilities/Duties:
*Minimum of six (6) years of experience with Linux/Unix based systems such as Red Hat Linux, Solaris, SuSE, CentOS, Oracle Linux, and z/OS; and serve as the advanced knowledge expert for all Linux environments.
*Responsible for the engineering design, installation, implementation, and configuration as well as ongoing support of the Unix/Linux Infrastructure.
*Possess advanced knowledge and skill for all Linux environments.
*Create and maintain bare-metal and virtual machines with the appropriate distribution and patch levels of Linux and network configuration, using tools that include Satellite Server, Puppet and BigFix.
*Provision/configure required software onto servers, such as web servers and databases.
*Evaluate, improve, and maintain the information security throughout the Linux infrastructure.
*Monitor and correct critical server issues and create recovery processes for failures and performance bottlenecks.
*Manage and monitor all installed systems and infrastructure.
*Possess excellent knowledge base in DNS, DHCP, LDAP, SMTP, and integration with Windows to solve functional or technical issues.
*Install, configure, test, and maintain operating systems, application software and system management tools.
*Ensure the highest levels of systems and infrastructure availability.
*Monitor and test application performance for potential bottlenecks, identify possible solutions, and work with developers to implement those fixes.
*Maintain security, backup, and redundancy strategies.
*Write and maintain custom scripts to increase system efficiency and lower the human intervention time on any tasks.
*Participate in the design of information and operational support systems.
*Shall provide 3rd level of support.
*Build new baselines with the appropriate security and access controls to include DISA STIGS and required security controls. Updated baselines will be required quarterly and new versions within 90 days of the manufacturer's release to production and full DISA STIGS.
*Engineer multi factor authentication between Linux environments and the enterprise Windows infrastructure components.
*Engineer solutions for baselines to operate in full standalone mode, domain mode, and fully integrated mode for all classification levels and enclaves.
*Work with the developers to transition applications from one platform to another to include from physical to virtual and virtual to cloud.
*Work with security components to resolve any security findings or vulnerabilities and apply fixes or updates as well as solutions to achieve closure.
*Be a liaison with vendors and other IT personnel for problem resolution.
*Ensure technical documentation exists for all systems and is kept up to date to include inventory and patch levels of all systems to include hostnames, property numbers, IP addresses, enclave, number of cores, number of processors, admin passwords, certificates, and service accounts on a monthly interval.
*Integrate systems with Windows as it applies to authentication and core services dependencies such single sign-on and Active Directory. Engineer and implement solutions for multi factor authentication with FBI standardized software and hardware.
*Document system configurations to include passwords, access controls, version number, and revision numbers, patch levels, and inventory to include hostnames, TCP/IP addresses, number of processors, and number of cores, memory, and license keys.
*Continually transition knowledge to the government staff through training and assistance on how to use the technology using industry best practices.
Required Qualifications:
*Red Hat Certified System Administrator (RHCSA) within six (6) months after hire date
Preferred Qualifications:
*Bachelor's Degree
Environmental Conditions:
* Contractor site with 0%-10% travel possible. Possible off-hours work to support data updates. General office environment. Work is generally sedentary in nature but may require standing and walking for up to 10% of the time. The onsite working environment is generally favorable. Lighting and temperature are adequate, and there are no hazardous or unpleasant conditions caused by noise, dust, etc. Work onsite is generally performed within an office environment, with standard office equipment available.
Physical Requirements:
* Stand or Sit; Use Hands / Fingers to Handle or Feel; See
Employees of Agile Defense are our number one priority, and the importance we place on our culture here is fundamental. Our culture is alive and evolving, but it always stays true to its roots. Here, you are valued as a family member, and we believe that we can accomplish great things together. Agile Defense has been highly successful in the past few years due to our employees and the culture we create together.
What makes us Agile? We call it the 6Hs, the values that define our culture and guide everything we do. Together, these values infuse vibrancy, integrity, and a tireless work ethic into advancing the most important national security and critical civilian missions. It's how we show up every day. It's who we are.
We also believe in supporting our employees by offering a competitive and comprehensive benefits package. To explore the benefits we offer, please visit our website under the Careers section.
Happy - Be Infectious.
Happiness multiplies and creates a positive and connected environment where motivation and satisfaction have an outsized effect on everything we do.
Helpful - Be Supportive.
Being helpful is the foundation of teamwork, resulting in a supportive atmosphere where collaboration flourishes, and collective success is celebrated.
Honest - Be Trustworthy.
Honesty serves as our compass, ensuring transparent communication and ethical conduct, essential to who we are and the complex domains we support.
Humble - Be Grounded.
Success is not achieved alone, humility ensures a culture of mutual respect, encouraging open communication, and a willingness to learn from one another and take on any task.
Hungry - Be Eager.
Our hunger for excellence drives an insatiable appetite for innovation and continuous improvement, propelling us forward in the face of new and unprecedented challenges.
Hustle - Be Driven.
Hustle is reflected in our relentless work ethic, where we are each committed to going above and beyond to advance the mission and achieve success.
Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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