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 practices
• Ability to craft compelling messaging for passive candidates

Key Outcomes

• Build strong pipelines of qualified candidates for immediate and future hiring needs
• Reduce time-to-fill for critical engineering and technical positions
• Maintain consistent and high-quality engagement with prospective candidates
• Enable recruiters and hiring managers to focus on interview, evaluation, and offer processes

Leadership Qualities

Bias to Action and Creative Problem Solving. Desire and experience questioning assumptions in ways that lead to break through ideas that are ultimately implemented. Successfully bring in applicable processes/concepts/materials from other industries to achieve efficiency gains. Ability to personally resolve minor issues in development without requiring significant support.

High Commitment, High Initiative. A successful candidate will have a genuine passion for Castelion's mission and consistently look for ways to contribute to the company's technical goals and prevent hardware blockers. Ability to work in a fast paced, autonomously driven, and demanding atmosphere. Strong sense of accountability and integrity.

Clear Communicator. Proactively communicates blockers. Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers. Capable of tactfully managing relationships with stakeholders to achieve company-desired outcomes without compromising relationships. Emails, IMs and verbal interactions are logical, drive clarity, and detailed enough to eliminate ambiguity.

Employment with Castelion is governed on the basis of competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

While this position does not currently require a U.S government-issued security clearance, it may in the near future. Therefore, the ability to obtain and maintain a U.S. government–issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.