Mid-level Linux Infrastructure Administrator
About The Position
Battelle’s Cyber Business Line is seeking a mid-level Linux Infrastructure Administrator to help operate and grow an airgapped, multi-site research network supporting 70+ scientists and engineers. This role spans the full infrastructure stack—virtualization, identity, storage, networking, automation, and observability—within a petabyte-scale environment working toward CMMC Level 2 compliance. As a Linux Infrastructure Administrator, you will work within a small, agile infrastructure team with broad ownership of the systems researchers depend on every day. This includes supporting enterprise virtualization, storage, networking, security hardening, automation, and GPU-enabled environments for offline AI/ML workloads. You will have the opportunity to design, automate, and improve infrastructure in a highly mission-focused, closed-network environment.
Requirements
- Experience with Linux systems administration in an enterprise or research environment.
- Experience with Linux domain administration, identity or directory services, centralized authentication, and host lifecycle management.
- Knowledge of networking fundamentals including TCP/IP, VLANs, firewalls, VPNs, and multi-site architectures.
- Experience with configuration management and automation tools such as Ansible, Puppet, Chef, or Salt.
- Experience with containerization and container orchestration technologies.
- Storage administration experience including RAID, volume management, network file shares, backup, and recovery.
- Strong Python and Bash scripting fundamentals.
- Virtualization experience with enterprise hypervisors such as VMware, Hyper-V, KVM-based platforms, or similar technologies.
- U.S. citizenship required.
- Ability to obtain and maintain a DoD Secret clearance.
Nice To Haves
- Experience administering airgapped, disconnected, or classified networks, including offline mirrors, removable-media transfer, and manual patch workflows.
- STIG, CIS benchmark, or other compliance baselining experience; familiarity with NIST SP 800-171 / CMMC.
- Identity and access management experience including directory services, LDAP/Kerberos, SSO/OIDC, PKI, and hardware-token deployment.
- Distributed NAS administration experience.
- Database administration experience in relational and/or search and analytics platforms.
- Monitoring and SIEM experience including metrics and dashboarding, log aggregation, and host-based intrusion detection.
- Experience with CI/CD and artifact management including pipelines, container registries, and offline package mirrors.
- Experience with bare-metal and golden-image provisioning tooling.
- Experience supporting GPU compute clusters or self-hosted AI/ML inference workloads.
- Experience establishing, writing, and enforcing infrastructure policy.
- Ability to work independently with minimal oversight.
- Relevant certifications such as RHCSA, CompTIA Linux+, or Security+ (DoD 8570 IAT Level II).
Responsibilities
- Administer Linux domain services including identity, authentication, DNS/NTP, and certificate services across an airgapped, multi-site environment.
- Build, deploy, and maintain virtual machines and services on enterprise virtualization platforms such as VMware, Proxmox, Nutanix, or similar technologies.
- Develop and maintain Ansible playbooks and provisioning workflows for repeatable, automated system configuration.
- Administer enterprise storage infrastructure including NAS platforms, network file shares, and object storage.
- Support network operations including VLAN segmentation, enterprise firewall rule management, site-to-site VPN, and remote-access VPN.
- Deploy and operate containerized services and support migration of core services to a container orchestration platform.
- Implement and maintain security hardening, patching, file integrity monitoring, and audit logging in a disconnected environment.
- Support compliance activities aligned to CMMC Level 2 / NIST SP 800-171, including evidence collection and configuration baselines.
- Collaborate closely with researchers and technical staff to improve reliability, automation, and usability of shared infrastructure.
Benefits
- Flexible, compressed work schedule with every other Friday off
- Paid time off (PTO)
- Medical, dental, and vision coverage with wellness incentives
- 401(k) retirement savings plan with employer contributions
- Tuition assistance for higher education
- Professional development opportunities and Internal Research and Development (IRAD) program participation
- Coverage for partners, gender-affirming care and health support, and family formation support.
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed
