{"id":2985217,"url":"https://alion.io/job/castelion-senior-cybersecurity-analyst","title":"Senior Cybersecurity Analyst","company":{"id":1795053,"name":"Castelion","domain":"castelion.com","url":"https://alion.io/company/castelion","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Security","role_family":"Security","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":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":113000,"max_usd":219000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1306},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Carbon Black","optional":false},{"name":"CMMC","optional":false},{"name":"Crowdstrike","optional":false},{"name":"DLP","optional":false},{"name":"IBM QRadar","optional":false},{"name":"NIST 800-171","optional":false},{"name":"SIEM","optional":false},{"name":"Splunk","optional":false},{"name":"Linux","optional":true},{"name":"Windows","optional":true}],"status":"live","first_seen_at":"2026-09-07T17:26:35Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-10-22T12:58:54Z","board_verified":true,"closed_at":null,"days_open":44,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":44},"description":"Why Castelion, Why Now \nCastelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability. \nThis is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function. \nSenior Cybersecurity Analyst\nWe are seeking an experienced Senior Cybersecurity Analyst to join our team. This role will be responsible for protecting sensitive systems, data, and infrastructure critical to national security. The ideal candidate will have expertise in threat detection, SOC operations, incident response, and compliance frameworks specific to the defense industrial base.\nResponsibilities\nLead 24/7 security monitoring efforts using SIEM platforms and advanced threat detection tools\nAnalyze security events, identify potential threats, and coordinate incident response activities\nIdentify vulnerabilities and recommend remediation strategies for complex environments\nAnalyze malware, APT tactics, and threat actor behavior\nPerform threat hunting activities to proactively identify sophisticated adversaries\nConduct forensic analysis of security incidents involving classified and sensitive systems\nContribute to compliance with NIST 800-171, CMMC, DFARS, ITAR, and other DoD requirements\nContribute to and/or maintain security documentation including internal documentation, policies and procedures, incident reports, and audit artifacts\nConfigure and maintain security tools including IDS/IPS, EDR, DLP, and vulnerability scanners\nSupport secure architecture reviews across the organization\nMentor junior analysts and contribute to team skill development\nCoordinate with IT, engineering, manufacturing, and program teams on security initiatives\nParticipate in threat intelligence sharing with government and industry partners\nBasic Qualifications\n3+ years of experience in cybersecurity, information security, or related technical security roles\nHands-on experience with security operations, incident response, and threat analysis\nExpert knowledge of security tools: SIEM (Splunk, QRadar, Sentinel), EDR (CrowdStrike, Carbon Black), IDS/IPS\nDeep knowledge of MITRE ATT&CK framework and adversary tactics, techniques, and procedures\nFamiliarity with threat intelligence platforms and OSINT techniques\nExperience protecting Controlled Unclassified Information (CUI)\nExperience operating within aerospace, defense, national security, government contracting, or highly regulated technical environments\nStrong understanding of network protocols, operating systems (Windows, Linux), and cloud environments\nExperience as a member of incident response protocols, vulnerability management, and security operations functions\nProficiency in scripting/automation\nU.S. Person status required to comply with ITAR regulations\nAbility to obtain and maintain a U.S. security clearance\nPreferred Skills and Experience\nExperience supporting defense manufacturing or operational technology (OT/ICS) environments\nExperience securing embedded systems, avionics, autonomous systems, or weapon systems\nExperience at high-growth startups or scaling organizations\nHands-on experience implementing SIEM and SOAR operations\nExperience with CMMC 2.0, NIST SP 800-171, DFARS 252.204-7012/7020/7021, ITAR, and related defense compliance requirements\nIndustry certifications such as Security+, CEH, CISA, GIAC, or equivalent\nDegree in Cybersecurity, Computer Science, Engineering, or related field\nAdditional Requirements\nAbility to put in extended hours, including evenings and weekends, when required to meet aggressive timelines\nThis role is based in Torrance, CA and requires full-time onsite presence\nCastelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details. \nOther Duties \nPlease note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice. \nAdditional Eligibility Requirements \nThis position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or applicable U.S. Government requirements. If the position is so designated, your employment in the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility requirements imposed by applicable law, regulation, executive order, or government contract requirements. You will be notified if and when such requirements apply. \nAffirmative Action/EEO Statement \nCastelion is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law. \nCastelion is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require a reasonable accommodation to complete an application, participate in the interview process, or otherwise participate in the hiring process, please contact . Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law. \nCastelion is committed to fostering a workplace where employment decisions are based on qualifications, business needs, and the ability to perform the essential functions of the role, with or without reasonable accommodation. \nEAR/ITAR Requirements \nThis position requires access to export-controlled information, and as such, employment (or hiring of a contractor) is contingent upon the candidate’s ability to access all applicable export-controlled information without additional export licensing being required by the Bureau of Industry and Security and/or the Directorate of Defense Trade Controls.","description_format":"text","description_chars":6481,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":true,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Information Security","Missiles","Defense Manufacturing"],"lifecycle":[{"event":"open","at":"2026-10-21T08:14:48Z"}],"visa":[],"liveness":{"score":25,"band":"fade","label":"Fading","p_open":1,"p_active":0.693,"p_room":0.36,"age_days":44,"expected_fill_days":29,"reasons":["conf:0","win:tail","crowd:brand"],"computed_at":"2026-10-22T06:10:10Z"},"pay":null,"html_url":"https://alion.io/job/castelion-senior-cybersecurity-analyst","json_url":"https://alion.io/job/castelion-senior-cybersecurity-analyst.json","meta":{"generated_at":"2026-10-22T13:19:30Z","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":12447,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"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":1795053},"rest":"https://alion.io/mcp/rest/get_company?id=1795053"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcastelion-senior-cybersecurity-analyst"},{"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%2Fcastelion-senior-cybersecurity-analyst"},{"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%2Fcastelion-senior-cybersecurity-analyst"},{"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/castelion-senior-cybersecurity-analyst\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcastelion-senior-cybersecurity-analyst"}]}