Sr Linux System Administrator

Description

We are looking for a Sr Linux Systems Administrator to join our team and provide expert‑level support for critical systems, services, and devices in both classified and unclassified spaces. This position involves working closely with other infrastructure teams to ensure system availability, reliability, and security in a high‑performance computing (HPC) environment.

This role requires an active Secret clearance and will be hybrid on site at Stennis Space Center.

As a Sr Linux Administrator, you will:

• Provide expert‑level administration of RedHat Linux systems, ensuring optimal performance and security.
• Perform systems enhancement, configuration, maintenance, installation, and software upgrades.
• Lead a team of high‑performing Linux administrators, providing guidance, technical expertise, and project leadership.
• Foster a collaborative and productive team environment, sharing lessons learned and best practices.
• Maintain and manage the Enterprise Satellite server, ensuring it meets the organization’s software deployment and updates needs.
• Automate routine and complex tasks using Ansible, streamlining operations and improving efficiency.
• Monitor and tune systems to achieve optimum performance levels, adhering to established policies, procedures, and service level agreements.
• Identify and address performance issues and optimize the production environment for mission‑critical systems.
• Perform acceptance testing of modules, subsystems, and total systems.
• Responsible for software installation, configuration, and ensuring adherence to configuration guidelines.
• Ensure compliance with established standards, policies, and configuration guidelines.
• Maintain documentation and records to demonstrate adherence to regulatory requirements.

We are looking for candidates with the following skills and qualifications:

• Technical Expertise: In‑depth experience with Linux server administration, particularly in high‑security environments, and comfortable working with both classified and unclassified systems.
• Collaboration: Works well in a team and can communicate effectively with network engineers, security specialists, and other infrastructure teams.
• Problem‑Solving: Skilled in identifying issues, troubleshooting, and implementing effective solutions in a timely manner.
• Automation Skills: Experience with scripting languages like Bash, Python, or Perl and tools such as Puppet or Ansible to automate system administration tasks.
• Security Awareness: Strong understanding of security practices, particularly in a DoD environment. Familiarity with STIGs.
• Adaptability: Comfortable working in a dynamic environment with rapidly changing priorities.
• Documentation: Excellent ability to document processes, procedures, and system configurations.

Top Skills:

• Active Secret Clearance
• Bachelor’s degree and at least 8 years of experience preferred (additional experience may be substituted for the degree)
• At least 6 years of experience in Linux/Unix system administration
• DoD 8570 IAT Level II or higher certification required—Security + and OS cert, Linux+, RedHat, etc. (waiver may be provided to obtain the OS certification)
• General knowledge of Linux and general Unix operating systems concepts as well as systems administration experience
• Ability to develop and maintain documentation on system administration procedures for routine and complex tasks

Preferred Education, Experience, & Skills:

• Experience supporting virtual machines, mass storage, and email servers
• Strong understanding of networking concepts (TCP/IP, DNS, routing, firewalls)
• Familiarity with DoD security guidelines and requirements (STIGs, FISMA, etc.)
• Experience with automation and scripting (Puppet, Ansible, Bash, Python, Perl)
• Experience working in a classified environment
• Ability to troubleshoot complex systems and infrastructure issues

Job Type & Location

This is a Contract to Hire position based out of Kiln, MS.

Pay and Benefits

The pay range for this position is $55.00 - $68.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:

• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan – Pre‑tax and Roth post‑tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long‑term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a hybrid position in Kiln, MS.

Application Deadline

This position is anticipated to close on Jul 21, 2026.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.