{"id":3774851,"url":"https://alion.io/job/aubrant-digital-senior-systems-engineer-linux","title":"Senior Systems Engineer, Linux","company":{"id":673309,"name":"Aubrant Digital","domain":"aubrant.com","url":"https://alion.io/company/aubrant","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":{"grade":"C","score":69,"open_postings":25,"ghost_share":0.52,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-07T05:47:08Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Escazú, Costa Rica"],"countries":["CR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"Azure","optional":false},{"name":"Bash","optional":false},{"name":"CentOS Stream","optional":false},{"name":"Chef","optional":false},{"name":"Configuration Management","optional":false},{"name":"Datadog","optional":false},{"name":"Git","optional":false},{"name":"GitHub","optional":false},{"name":"Linux","optional":false},{"name":"Prometheus","optional":false},{"name":"Python","optional":false},{"name":"Red Hat","optional":false},{"name":"ServiceNow","optional":false},{"name":"Tanium","optional":false},{"name":"VMWare","optional":false},{"name":"Windows","optional":false},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-11-04T19:58:03Z","employer_posted_date":"2026-11-04","last_verified_at":"2026-11-07T10:43:08Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":2},"description":"About Aubrant\nAubrant Digital is a leader in multi-shore custom application development. We are passionate about solving our clients’ business problems through consultative teamwork, innovative software, and proven processes. We’ve served more than 50 clients and delivered hundreds of high quality, custom enterprise applications. Our clients value us as integral team members who get the job done on time and on spec, and we are proud of our high client retention rate and under 2% staff turnover. With offices in New Jersey, Boston, Costa Rica, and Eastern Europe, we execute the full software lifecycle, from architecture and design through development, QA and application maintenance & support. Our company culture emphasizes client service, trust-based relationships, and innovation.\nAbout the role\nAubrant Digital is seeking a Senior Systems Engineer, Linux, to own the Linux platform in a large US-based client data center supporting a 2,000+ virtual server environment (Windows and Linux). The RHEL and CentOS estate is already largely automated through Chef. You will administer RHEL 8, 9, and 10 and CentOS servers; troubleshoot kernel and system issues and tune performance; harden servers and remediate vulnerabilities; maintain and extend Chef cookbooks, using Ansible where it fits; support the monthly OS patch cycle; and coach the Infrastructure Administrators on Linux work. You will join Aubrant's cloud and infrastructure engineering group (we call it a studio), which gives you a technical leader to escalate to, peers on other engagements to call on, and a shared catalog of scripts and hardened builds to start from.\nMust-Have Requirements\n7+ years of administering Linux in enterprise data centers.\nRed Hat Enterprise Linux (RHEL 8 or 9) in production; CentOS experience.\nChef in production: writing and maintaining cookbooks.\nKernel and system-level troubleshooting and performance tuning.\nLinux security hardening and vulnerability remediation.\nBash and Python scripting, with changes kept in a Git repository (the client uses GitHub).\nNetworking fundamentals (server IP addressing, subnets, firewall rules) and the ability to explain a needed network change to the network team.\nAbility to triage and resolve tickets and alerts independently through incident, change, and problem management, escalating only when needed.\nWillingness and availability to participate in the client's seven-day on-call rotation and to shift working hours for planned overnight maintenance windows.\nProfessional written and spoken English; daily collaboration with a US-based client team.\nShould-Have Requirements\nAnsible for configuration management.\nRHEL 10.\nTanium for OS patching.\nLinux on VMware vSphere.\nAzure IaaS.\nFamiliarity with Datadog, Prometheus, or ServiceNow.\nExperience coaching administrators or junior engineers on Linux work.\nCould-Have / Nice-to-Have Requirements\nTerraform (not widely used by the client yet, but the team is moving toward infrastructure as code).\nRelevant vendor certifications (not required; hands-on experience is valued over certificates).\nIdeal Candidate Traits:\nCurious, proactive, and collaborative.\nStrong communication and teamwork skills.\nCommitted to delivering solutions together, not in competition.\nWorks comfortably the client's incident, change, and problem management, keeps looking for the next thing to automate, and promotes a one-team culture.","description_format":"text","description_chars":3407,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-11-04T22:55:38Z"}],"visa":[],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.632,"p_room":1,"age_days":2,"expected_fill_days":36,"reasons":["conf:3","stale_co","velocity","win:early"],"computed_at":"2026-11-07T05:47:08Z"},"pay":null,"html_url":"https://alion.io/job/aubrant-digital-senior-systems-engineer-linux","json_url":"https://alion.io/job/aubrant-digital-senior-systems-engineer-linux.json","meta":{"generated_at":"2026-11-07T12:08:14Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":13215,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-08T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":673309},"rest":"https://alion.io/mcp/rest/get_company?id=673309"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Faubrant-digital-senior-systems-engineer-linux"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Faubrant-digital-senior-systems-engineer-linux"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Faubrant-digital-senior-systems-engineer-linux"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/aubrant-digital-senior-systems-engineer-linux\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Faubrant-digital-senior-systems-engineer-linux"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3774851}},{"tool":"search_jobs","arguments":{"company":"aubrant.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3774851},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); 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