Senior Technical Sourcer (Contract)

Why Castelion, Why Now Castelion 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. This 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. Senior Technical Sourcer (Contract) Castelion is seeking an experienced Senior Technical Sourcer (Contract) to help us identify, engage, and pipeline top talent for our rapidly growing hardware and technology teams. This is a contract role supporting high-impact hiring initiatives across engineering, manufacturing, and corporate functions. While onsite at our Torrance, CA headquarters is preferred, we are open to hybrid or remote arrangements for the right candidate. You will work closely with recruiters, hiring managers, and HR leadership to source and attract candidates in highly competitive markets. Success in this role requires experience in hardware companies or high-growth startup environments, as well as creativity, persistence, and the ability to quickly understand specialized technical skill sets. This role is flexible with a preference for onsite support at our Torrance, CA headquarters, though hybrid arrangements are possible. This is a 6-month contract with the potential to extend based on performance. High-performing contractors may also be considered for full-time opportunities. Responsibilities • Conduct targeted sourcing to identify qualified candidates for hard-to-fill engineering, hardware, and corporate roles • Utilize LinkedIn, GitHub, personal networks, industry forums, and other platforms to engage passive talent • Partner with recruiters and hiring managers to understand role requirements and key candidate attributes • Maintain organized candidate pipelines and provide regular updates to the recruiting team • Support outreach campaigns and initial candidate engagement, including phone/email touchpoints • Contribute to employer branding initiatives by highlighting Castelion's mission, culture, and growth opportunities • Track sourcing metrics and provide insights to improve strategies and outcomes Basic Qualifications • 3+ years of recruiting or sourcing experience, preferably in hardware companies, defense, or high-growth startup environments • Strong experience leveraging LinkedIn Recruiter and other sourcing tools • Excellent research, organizational, and communication skills • Proven ability to identify and engage passive candidates • Comfortable operating in a fast-paced, high-growth environment Preferred Skills and Experience • Familiarity with technical roles such as mechanical, electrical, or software engineering • Experience supporting recruiting for scaling hardware teams in early-stage startups • Strong understanding of the candidate market, competitive landscape, and sourcing best practices • Ability to craft compelling messaging for passive candidates Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details. Other Duties Please 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. Additional Eligibility Requirements This 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. Affirmative Action/EEO Statement Castelion 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. Castelion 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 hr@castelion.com. Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law. Castelion 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. EAR/ITAR Requirements This 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.