Senior Technical Sourcer (Contract)

About Castelion Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts. 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…