{"id":2985216,"url":"https://alion.io/job/castelion-senior-cybersecurity-architect","title":"Senior Cybersecurity Architect","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":"staff","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":131000,"max_usd":262000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":451},"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CMMC","optional":false},{"name":"Crowdstrike","optional":false},{"name":"Defense in Depth","optional":false},{"name":"GCP","optional":false},{"name":"ISO 27001","optional":false},{"name":"Least Privilege","optional":false},{"name":"Nessus","optional":false},{"name":"SIEM","optional":false},{"name":"Snort","optional":false},{"name":"Splunk","optional":false},{"name":"Threat Modeling","optional":false},{"name":"Zero Trust","optional":false},{"name":"NIST 800-171","optional":true}],"status":"live","first_seen_at":"2026-09-07T17:26:49Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-11-09T23:54:44Z","board_verified":true,"closed_at":null,"days_open":63,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":63},"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 Architect\nWe are seeking a Senior Cybersecurity Architect to lead the design and implementation of secure, resilient information security systems, monitoring, red/blue team activities, and more in support of regulated, compliance-heavy environments. This hands-on role is responsible for translating mission, system, and regulatory requirements into end-to-end cybersecurity solutions. These complete solutions should benefit from the candidate's experienced and thoughtful implementation of company policy, automation and enforcement of workflows/processes, and technical security measures.\nBased in our Torrance, CA HQ, you'll lead efforts to build, maintain, and continuously improve our security and compliance posture across both local and remote sites. You'll collaborate with cross-functional teams-including IT, software development, operations, engineering, manufacturing, and legal-to ensure our security controls meet both technical and regulatory standards.\nThe ideal candidate brings deep technical expertise, strong systems thinking, hands-on experience, and is well-versed in frameworks like NIST SP 800-171, CMMC, or ISO 27001.\nIf you love solving hard problems under strict rules, thrive in high-stakes environments, and believe security should be a business enabler-not a blocker-this role is for you.\nResponsibilities\nDefine and implement security architectures aligned with Zero Trust principles, defense-in-depth, and least-privilege models\nDevelop security reference architectures, patterns, and standards for enterprise and program-level systems\nEnsure cybersecurity is embedded across the full system lifecycle (requirements, design, development, test, deployment, sustainment)\nDesign, implement, and maintain cybersecurity tools and systems, including firewalls, EDR, IDS/IPS, SIEM, and vulnerability scanners.\nConduct threat modeling, security risk assessments, and vulnerability analyses.\nProactively monitor security events, investigate suspicious activity, and respond to incidents with urgency and precision.\nDevelop and maintain System Security Plans (SSPs), POA&Ms, and supporting documentation for audits and assessments.\nPartner with IT, engineering, DevSecOps, and Program Security to integrate security into infrastructure and application design.\nManage security patching cycles and lead remediation efforts based on risk assessments.\nSupport audit, compliance, and risk management activities (e.g., NIST, CMMC, & others) and manage supply chain cybersecurity concerns.\nConduct regular internal audits and readiness checks in preparation for external audits or DoD reviews.\nServe as on-site cybersecurity expert for Torrance HQ and occasionally travel (5-10%) to other locations (TX/NM).\nRequired Qualifications\n7-10+ years of hands-on experience in cybersecurity engineering, infrastructure security, or related fields.\nStrong technical background in network security, endpoint protection, access control, and vulnerability management.\nProficiency with modern security tools (e.g., CrowdStrike, Palo Alto, Nessus, Splunk, Snort, etc.).\nExperience with incident response, malware analysis, and penetration testing.\nDemonstrated experience with cloud security (AWS, Azure, or GCP).\nDeep understanding of security principles, threats, and frameworks (e.g., cyber kill chain, MITRE ATT&CK, NIST, CIS Controls).\nStrong documentation, troubleshooting, and communication skills.\nAbility to thrive in fast-paced, high-pressure environments with competing priorities.\nAbility to pivot between analyst, threat hunter, and implementer roles with ease.\nEligibility to keep and maintain a U.S. security clearance.\nPreferred Qualifications\nExperience in regulated environments (DoD, aerospace, SCIFs).\nActive Security+, CISSP, CISM, CEH, or similar senior-level certification(s).\nRelevant experience with NIST 800-171, CMMC, DFARS, or other in relation to cybersecurity audit readiness.\nExperience with incident response, malware analysis, or penetration testing is a plus.\nExperience in SOC operations.\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":7136,"description_truncated":false,"requirements":{"experience_years_min":7,"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":36,"band":"fade","label":"Fading","p_open":1,"p_active":0.825,"p_room":0.44,"age_days":62,"expected_fill_days":46,"reasons":["conf:1","velocity","win:tail","crowd:brand"],"computed_at":"2026-11-09T06:03:00Z"},"pay":null,"html_url":"https://alion.io/job/castelion-senior-cybersecurity-architect","json_url":"https://alion.io/job/castelion-senior-cybersecurity-architect.json","meta":{"generated_at":"2026-11-10T03:52:39Z","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":9076,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-11T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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-architect"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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-architect"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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-architect"},{"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-architect\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcastelion-senior-cybersecurity-architect"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2985216}},{"tool":"search_jobs","arguments":{"company":"castelion.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2985216},"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); https://alion.io/mcp with an Alion account has everything. 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