{"id":2984990,"url":"https://alion.io/job/castelion-senior-rf-systems-engineer","title":"Senior RF Systems Engineer","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":"Hardware","role_family":"Hardware","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":["Allen, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":98000,"max_usd":180000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1517},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-09-24T18:39:24Z","employer_posted_date":"2026-10-02","last_verified_at":"2026-10-29T08:33:53Z","board_verified":true,"closed_at":null,"days_open":34,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":34},"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 RF Systems Engineer\nCastelion is building next-generation, high-performance systems where cost, scale, and speed matter as much as technical excellence. We are looking for an RF Systems Engineer to lead the design and development of a multi-channel exciter/receiver subsystem that interfaces between RF hardware and digital baseband systems.\nIn this role, you will own the subsystem end-to-end (from architecture and design through production) ensuring it is performant, affordable, and producible at scale.\nYou will not be starting from scratch. You will work within an existing system architecture, leveraging established concepts, infrastructure, and a high-performing team to rapidly iterate and improve the design. Success in this role requires someone who can build on what exists, make it better, and deliver without reinventing for the sake of it.\nThis is not a lone-wolf role. You will be the missing piece in a tightly integrated team of engineers across software/firmware, power, manufacturing, and test. You will operate as a technical leader within that team, collaborating closely, making trade-offs, and driving the subsystem to production readiness.\nResponsibilities\nOwn the exciter/receiver subsystem end-to-end as both systems engineer and RF design lead, driving architecture, design, integration, and production readiness\nDesign and deliver a multi-channel RF system bridging RF front-end and digital baseband, optimizing for performance, cost, and manufacturability\nLead RF system modeling and analysis, including phase noise, spur analysis, gain, noise figure, compression, and dynamic range\nExecute hands-on design validation and debugging in the lab, using RF test equipment to ensure performance and reliability\nPartner cross-functionally with software, firmware, power, manufacturing, and test teams to ensure seamless system integration and scalable production\nCollaborate with suppliers and fabrication partners to optimize RF PCB designs, improve technical performance, and reduce cost\nDevelop and influence test strategies and infrastructure that achieve lower cost and higher throughput than traditional approaches without sacrificing screening effectiveness\nDrive design decisions that enable aggressive production goals and ensure resilience to supply chain disruptions\nDeliver a solution that meets a target cost, significantly improving on traditional system costs\nEstablish a production-first standard for the subsystem, improving design quality, reducing preventable errors, and minimizing the need for day-to-day oversight\nStrengthen supplier relationships and technical engagement, enabling better responsiveness, more sourcing flexibility, and improved design-for-manufacturing outcomes\nConsistently balance and deliver strong technical performance within real-world constraints such as cost, schedule, and manufacturability\nBasic Qualifications\nBachelor's or Master's degree in Electrical Engineering, RF Engineering, or related field\nExperience with high-frequency RF PCB design\nProficiency in RF system modeling and analysis\nHands-on experience with RF lab equipment and testing\nAbility to design and analyze complex RF systems from architecture through implementation\nPreferred Skills and Experience\nExperience designing RF systems including phase noise budgeting, spur analysis, RF system synthesis, and performance modeling\nExperience working with PCB fabrication houses to realize RF structures, including understanding fabrication limits and cost drivers\nExperience with RF simulation tools such as ADS, HFSS, or CST, including design verification and iteration\nFamiliarity with supplier capabilities and constraints across RF components and fabrication\nExperience developing or supporting production test strategies\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":6860,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":true,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Missiles","Defense Manufacturing"],"lifecycle":[{"event":"open","at":"2026-10-21T08:14:48Z"}],"visa":[],"liveness":{"score":64,"band":"ok","label":"Likely open","p_open":1,"p_active":0.849,"p_room":0.75,"age_days":34,"expected_fill_days":46,"reasons":["conf:1","velocity","win:late","comp:brand"],"computed_at":"2026-10-29T05:49:05Z"},"pay":null,"html_url":"https://alion.io/job/castelion-senior-rf-systems-engineer","json_url":"https://alion.io/job/castelion-senior-rf-systems-engineer.json","meta":{"generated_at":"2026-10-29T09:11:21Z","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":13944,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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-rf-systems-engineer"},{"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-rf-systems-engineer"},{"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-rf-systems-engineer"},{"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-rf-systems-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcastelion-senior-rf-systems-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2984990}},{"tool":"search_jobs","arguments":{"company":"castelion.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2984990},"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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