Senior Linux Administrator (Top Secret/SCI Clearance )

What company will I be working for? You will be working for a national security services firm, providing cutting-edge services across DoD and other agencies. At Inflow, we believe in making it matter for every employee, every customer, and every mission we support. That means that we put employees first, providing both innovative benefits and great technology. Check out to learn more about what it's like to be an Inflowee.


Who will I be working with? In support of Inflow's contract with the Government, you will be working alongside Government civilians and other Government contractors.


What level Clearance do I need? You must possess an active DoD Top Secret clearance, with eligibility for SCI and a CI Scope Polygraph within 180 days.

What will I be doing? Using your expertise in Linux administration, you will be providing support for critical missions, ensuring that data stays fast, fluid, and impenetrable. In addition, you will:

• Lead the design and lifecycle management of mission-critical Linux workstations, enterprise-grade servers, and high-performance computing (HPC) clusters.
• Treat the data center as a codebase. Develop sophisticated automation workflows using Python, Bash, and Ansible to eliminate manual toil and ensure drift-free configurations.
• Modernize scientific workflows by deploying and managing isolated environments using Podman while working to establish a Kubernetes environment.
• Configure and optimize high-bandwidth networking, including InfiniBand fabrics, for seamless inter-node communication.
• Author high-fidelity playbooks and strategic architectural diagrams that serve as the blueprint for our evolving infrastructure.
• Push the limits of the silicon. Optimize cluster scheduling and management utilizing industry-leading tools like Bright Cluster Manager and Slurm.
• Implement "Hardened by Design" security. Fine-tune SELinux policies and advanced firewall configurations to protect sensitive data without sacrificing computational performance.
• Master the art of data movement. Administer complex local and distributed filesystems (Lustre, GPFS/Spectrum Scale) to ensure extreme-speed access across the fabric.
• Other duties as assigned

What experience, training, and education do I need?

You must meet the minimum requirements:

• Bachelor's degree in Computer Science, Math, Engineering, Physics, or STEM
• Ability and willingness to obtain and maintain Special Access Program (SAP) eligibility
• Deep-tier professional experience in Linux systems engineering (RHEL/ /Rocky preferred)
• Active DoD 8570.01-M baseline certification (Security+ CE, SSCP, or equivalent)
• Active DoD Top Secret Clearance with eligibility for SCI and a CI Scope Polygraph within 180 days of hire

The following is preferred:

• Supercomputing Experience: Direct experience tuning kernel parameters and MPI libraries for large-scale distributed computing
• Hybrid Virtualization: Expertise in VMware, Nutanix, or KVM within a heterogeneous environment that include Windows integration
• Advanced Certification: RHCE, RHCSA, or similar

Where is the client site that I would be working for? You will be working in Huntsville, AL. Address disclosed after your clearance is verified.

Inflow is an EEO/Affirmative action employer and is committed to hiring and retaining a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.


By submitting your application for a position at Inflow, you acknowledge and consent to our participation in the E-Verify program. If selected for hire, you will be required to provide specific documentation to establish your identity and eligibility to work in the United States, as required by federal law.