Senior Technical Sourcer

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.

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.

• Conduct targeted sourcing to identify qualified candidates for hard-to-fill engineering, hardware, and corporate roles
• Utilize Linked In, Git Hub, 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

• 3+ years of recruiting or sourcing experience, preferably in hardware companies, defense, or high-growth startup environments
• Strong experience leveraging Linked In 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

• 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.

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.

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…