{"id":1503131,"url":"https://alion.io/job/by-light-linux-system-administrator","title":"Linux System Administrator","company":{"id":1964053,"name":"By Light","domain":"bylight.com","url":"https://alion.io/company/bylight","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"iCIMS","truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Falls Church, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":107000,"max_usd":208000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1020},"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"Bash","optional":false},{"name":"Chef","optional":false},{"name":"Configuration Management","optional":false},{"name":"ITIL","optional":false},{"name":"ITSM","optional":false},{"name":"Linux","optional":false},{"name":"Perl","optional":false},{"name":"PowerShell","optional":false},{"name":"Puppet","optional":false},{"name":"Python","optional":false},{"name":"Ruby","optional":false},{"name":"TCP/IP","optional":false},{"name":"Unix","optional":false}],"status":"live","first_seen_at":"2026-09-30T04:41:54Z","employer_posted_date":"2026-09-30","last_verified_at":"2026-09-30T14:00:37Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Company Overview\nBy Light Professional IT Services LLC readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams for whatever comes next. Headquartered in McLean, VA, By Light supports defense, civilian, and commercial IT customers worldwide.\nPosition Overview\nBy Light has an opening for a Sr. Systems Administrator (Linux/Unix) position supporting the Army National Guard (ARNG) in Falls Church, VA. This is an IT Service Management contract in support of the operation, modernization, expansion, and further evolution of the ARNG’s global Information Technology (IT) services including networking, compute, storage, infrastructure, applications, hosting, and program management services. The GECOS program supports the ARNG enterprise IT infrastructure, its Wide Area Network (WAN), authentication and directory services, cybersecurity, application hosting, and associated services. GECOS uses ITIL best practices framework as the basis for IT Service Management (ITSM) model.\nThree (3) days onsite with up to two (2) days telework. Onboarding/transition in periodrequires on-site support up to 60 days. GECOS work schedules are subject to change on direction by mission requirements.\nResponsibilities\nProvide system administration support for Linux operating systems including installing software, applying patches, managing file systems, monitoring performance, and troubleshooting alerts from monitoring tools.\nAnalyzes and resolves problems associated with the operating system, servers, hardware, and applications software.\nDetects, diagnoses, and reports related problems on servers, including system failure analysis and recovery, insuring the consistency and integrity of file systems.\nIn-depth hardware configuration knowledge, shell programming expertise, and a solid understanding of standard concepts, practices, and procedures. Relies on experience and judgment to plan and accomplish goals, performs a variety of tasks, and works under general supervision.\nResponsible for daily monitoring of interface programs between multiple enterprise systems; review daily logs and ensure successful completion.\nPerform incremental and full cold backups/patching.\nResponsible for DoD Linux Security Technical Implementation Guides (STIGs).\nProvide performance metrics and usage charts, including CPU usage, disk usage and network uptime for the Linux Servers.\nProvide general maintenance, upgrades, and new installation of servers and coordinate with data center personnel to execute. Document and generate business processes for day-to-day and emergency support procedures.\nInstall, test, and verify Linux Security patches; coordinating, documenting requirements and timelines, and working closely with service owners.\nPerform systems security administration functions, including creation and maintenance of customer profiles and accounts.\nResponsible for creating and/or maintaining standard operating procedures for the Linux documentation library.\nImplement, configure, update, and maintain Ansible servers and scripts.\nImplement, configure, update, and maintain STIG Manager servers and scripts.\nImplement, configure, update, and maintain the Linux operating system firewall.\nExperience in handling NFS, CIFS, and SMB permissions.\nRequired Experience/Qualifications\nHigh school diploma or AA. Preferred - Bachelor’s degree in information technology, computer science or a related technical discipline, or the equivalent combination of education, technical certifications or training, or work experience.\n6+ years of overall demonstrated experience as a RHEL 7 and/or RHEL 8 Servers\nMust Possess the appropriate baseline certification(s) to achieve DoD 8570.01-M Information Assurance Technical (IAT) Level II (CompTIA Security+ ce) and additional Computing Environment (CE) certification (RHEL7 and/or RHEL 8) When 8140 requirements are implemented on program/contract, employee will need to conform to 8140 certification standards\nExperience managing RHEL 7 and RHEL 8 Linux servers\nHighly versed in Linux administration and best practices\nFamiliar with enterprise network architectures\nExperience with automated configuration management (Ansible, Puppet, Chef, etc.)\nFamiliar in programming/scripting skills for automation (Bash, Ruby, Python, Perl, etc.)\nGeneral understanding of Linux internals (system calls, file systems, processes, etc.)\nGeneral understanding of TCP/IP and related protocols (HTTP, FTP, NFS, etc.)\nExperience with PowerShell scripting engine to automate tasks.\nExcellent problem solving, analytical, and decision-making capabilities, including understanding user requirements, troubleshooting technical issues, successfully resolving issues and challenges, and developing creative solutions for process improvement.\nDependability, in that the individual is consistently at work and on time, follows instructions, responds to management direction, and solicits feedback to improve.\nMust have customer service experience as this position will require candidate to engage with senior military and government leadership.\nMust be able to present your ideas clearly through briefings, meetings, and interaction with leadership of different skill sets.\nMust be able to provide training sessions as required.\nMust be able to engage with stakeholders to ensure tasks are progressing and meeting timelines.\nExcellent communication skills\nExcellent documentation skills\nStrong organizational and collaborative skills\nStrong teamwork and engagement as a project team member.\nAbility to assimilate information rapidly, motivated to self-study new requirements.\nMaintain current industry knowledge of relevant concepts, practices, and procedures.\nAbility to work under time constraints.\nAdapt to changes in requirements and new projects.\nManage or serve as a team lead.\nMaintain and upgrade certifications.\nOther duties may be assigned, directed, or requested.\nSpecial Requirements/Security Clearance\nMust have a minimum of an active Secret clearance at time of interview and candidate must maintain active clearance.\nSalary Range\nSalary Minimum: $90,000\nSalary Maximum: $120,000\nThe annual base salary provided is a guideline for this position and is not a guarantee of compensation or salary. When extending an offer, By Light also considers other variables such as (but not limited to) work experience, education, training, skill set, internal peer equity, clearance level, and market conditions. In addition, By Light provides an extensive selection of benefits and offerings to our employees.","description_format":"text","description_chars":6595,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"high_school","optional":true},"security_clearance":true,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Military","Science & Engineering"],"lifecycle":[{"event":"open","at":"2026-09-30T04:41:54Z"}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":30,"reasons":["conf:15","velocity","win:early"],"computed_at":"2026-10-01T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/by-light-linux-system-administrator","json_url":"https://alion.io/job/by-light-linux-system-administrator.json","meta":{"generated_at":"2026-10-01T10:19:00Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":1399,"day_limit":5000,"remaining_today":3601,"minute_limit":60,"resets_at":"2026-10-02T00:00:00Z"}}}