{"id":923333,"url":"https://alion.io/job/rapidfort-infrastructure-engineer","title":"Linux Systems Administrator","company":{"id":1398,"name":"RapidFort","domain":"rapidfort.com","url":"https://alion.io/company/rapidfort","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":75,"open_postings":9,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-04T06:34:25Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":120000,"max":150000,"currency":"USD","period":"year","gross":null,"usd_annual":150000},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"Bash","optional":false},{"name":"Configuration Management","optional":false},{"name":"CUDA","optional":false},{"name":"DNS","optional":false},{"name":"Docker","optional":false},{"name":"ISO 27001","optional":false},{"name":"Kubernetes","optional":false},{"name":"KVM","optional":false},{"name":"Least Privilege","optional":false},{"name":"Linux","optional":false},{"name":"Proxmox VE","optional":false},{"name":"Python","optional":false},{"name":"SOC 2","optional":false},{"name":"TCP/IP","optional":false},{"name":"Ubuntu","optional":false},{"name":"VMWare","optional":false}],"status":"closed","first_seen_at":"2026-09-14T22:35:41Z","employer_posted_date":"2026-10-21","last_verified_at":"2026-11-03T22:12:23Z","board_verified":false,"closed_at":"2026-11-03T22:12:23Z","days_open":49,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":49},"description":"Linux Systems Administrator\nLocation: Remote - United States\nDepartment: Information Technology - Infrastructure Engineering\nReports to: Infrastructure Engineering Manager\nEmployment Type: Full-time, individual contributor\nExperience: 7+ years of relevant hands-on experience\nBase Salary: $120,000-$150,000 annually, plus equity and benefits\nEligibility: U.S. citizenship required\nAbout RapidFort\nRapidFort helps enterprises and government organizations reduce software supply chain risk through hardened container images, runtime-based attack surface reduction, and automated vulnerability remediation.\nWe own and operate infrastructure that supports our engineering teams and core systems. We’re hiring an experienced Linux systems administrator to keep that environment secure, reliable, and running efficiently.\nThe Role\nWe’re looking for a technically sharp, hands-on Linux administrator who investigates problems thoroughly, takes ownership, and delivers lasting solutions.\nYou will administer production Linux systems, troubleshoot complex issues, write automation, and improve day-to-day operations. You should be comfortable moving from an unfamiliar symptom to a diagnosis, implementing a controlled fix, and verifying that the underlying problem is resolved.\nThis is a senior individual contributor role with direct responsibility for technical execution. Strong Bash scripting, practical Python skills, and deep Linux troubleshooting experience are essential. You will work closely with our infrastructure engineers while independently owning assigned systems, incidents, and improvements.\nThe position is remote within the United States. Physical data center experience is beneficial but is not required.\nWhat You’ll Do\nLinux Systems Administration\nBuild, configure, administer, and harden Linux systems, primarily RHEL/Rocky Linux and Ubuntu.\n\nManage system services, packages, users, permissions, authentication, and access controls.\n\nOwn operating system lifecycle work, including patch testing, staged deployment, upgrades, exception tracking, and end-of-life remediation.\n\nMaintain consistent configurations and identify configuration drift.\n\nSupport remotely managed physical servers and virtualized environments.\n\nTroubleshooting and Incident Ownership\nIndependently diagnose production issues involving CPU, memory, disk I/O, filesystems, systemd, networking, and service dependencies.\n\nInvestigate failed services, boot problems, resource exhaustion, package conflicts, and intermittent performance issues.\n\nUse logs, metrics, and command-line diagnostic tools to identify root causes and validate fixes.\n\nCoordinate with engineering teams and vendors when an issue crosses system boundaries.\n\nContribute to incident reviews and complete corrective actions that prevent recurrence.\n\nEscalate appropriately, with clear findings, supporting evidence, and a record of troubleshooting already performed.\n\nAutomation and Configuration Management\nWrite, debug, and maintain Bash scripts for provisioning, diagnostics, remediation, reporting, and routine operations.\n\nDevelop and maintain Python automation where it improves reliability or simplifies operational work.\n\nWrite and maintain Ansible roles and playbooks under established team standards.\n\nReplace repetitive manual tasks with reliable, maintainable automation.\n\nTest changes and maintain automation in version control.\n\nSecurity and Operational Reliability\nApply Linux security baselines, least-privilege access, and timely security updates.\n\nImprove monitoring and alerting to detect problems early and reduce unnecessary noise.\n\nMaintain backup processes and test recovery procedures.\n\nExecute planned changes with documented implementation, validation, and rollback steps.\n\nMaintain clear runbooks, configuration records, and troubleshooting documentation.\n\nParticipate in a shared on-call rotation and scheduled maintenance windows.\n\nWhat You’ll Bring\n7+ years of hands-on experience administering Linux in production environments, including recent responsibility for systems operations and troubleshooting.\n\nDeep practical knowledge of Linux processes, services, permissions, package management, filesystems, logging, and resource management.\n\nStrong experience with RHEL/Rocky Linux and Ubuntu.\n\nStrong Bash scripting skills. You can independently write, troubleshoot, and maintain shell scripts used in production.\n\nPractical Python skills for systems automation and operational tooling.\n\nHands-on experience writing and maintaining Ansible roles and playbooks, or substantial experience with a comparable configuration management platform.\n\nStrong networking fundamentals, including TCP/IP, subnetting, routing, DNS, firewalls, SSH, and connectivity troubleshooting.\n\nExperience supporting virtualization, storage, monitoring, and backup and recovery.\n\nA record of personally resolving complex technical problems and following through on corrective actions.\n\nSound judgment about change risk, testing, rollback, and escalation.\n\nClear communication and the ability to work independently within a remote team.\n\nRecent technical execution is essential. Candidates whose current responsibilities are primarily people management should be able to demonstrate continued, direct ownership of Linux administration, scripting, and troubleshooting.\nHelpful Additional Experience\nLinux hardware diagnostics involving PCIe devices, drivers, firmware, and kernel logs.\n\nGPU servers, NVIDIA drivers, CUDA environments, or infrastructure supporting AI workloads.\n\nVirtualization technologies such as KVM, Proxmox, VMware, or LXC.\n\nSAN/NAS storage, logical volume management, and multipathing.\n\nRemote server management through IPMI, iDRAC, iLO, or similar tools.\n\nDocker, containers, or Kubernetes.\n\nInfrastructure supporting SOC 2 or ISO 27001 controls.\n\nPhysical data center operations.\n\nWhat Success Looks Like\nWithin 90 days: You understand the environment, independently administer standard systems, resolve common incidents, and execute controlled changes.\nWithin six months: You own assigned systems and operational responsibilities, handle on-call issues effectively, and have automated recurring manual work.\nOver time: You reduce repeat incidents, improve system reliability, and become a trusted technical resource for Linux troubleshooting and automation.\nLocation and Eligibility\nMust reside and work within the United States.\n\nU.S. citizenship is required to support federal programs and contractual requirements.\n\nMust be available for the shared on-call rotation and scheduled maintenance.\n\nCompensation and Benefits\nBase salary: $120,000-$150,000 annually, depending on relevant experience and demonstrated technical skills.\n\nEquity participation.\n\nMedical, dental, and vision coverage.\n\n401(k) with company contribution.\n\nPaid time off.\n\nRemote work within the United 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