Job Description

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.

Junior Sourcer / Recruiting Coordinator (100% onsite)

We’re growing rapidly—and we’re looking for a high-energy, detail-obsessed Junior Sourcer / Recruiting Coordinator to help us scale our exceptional team. If you thrive in fast-paced, hardware-rich environments and have an eye for technical talent, we want to meet you.

Responsibilities

• Partner closely with recruiters and hiring managers to understand key talent needs across engineering, manufacturing, and aerospace functions
• Build and maintain robust pipelines of technical candidates, especially in mechanical, electrical, systems, and aerospace engineering roles
• Proactively source passive candidates
• Screen and engage candidates via messaging, email, and phone to assess fit and interest
• Manage scheduling for interviews and ensure a high-quality candidate experience throughout the hiring process
• Maintain our ATS with accurate candidate and requisition data
• Support recruiting operations, including tracking metrics, coordinating events, and helping with offer logistics

Basic Qualifications

• 1–3 years of experience in a recruiting, sourcing, or coordination role—ideally within aerospace, defense, or high-reliability manufacturing
• Familiarity with recruiting for hardware-focused engineering roles (e.g., mechanical, propulsion, avionics, manufacturing, test engineering, etc.)
• Strong sourcing skills and comfort using platforms like LinkedIn Recruiter, Github, Reddit, Google X-Ray, University Alumni Pages, Boolean search strategies, etc.
• Detail-oriented and highly organized—able to juggle multiple reqs, candidates, and hiring teams
• Unflappable under pressure and thrives in fast-paced, ambiguous environments
• Comfortable working 100% onsite in Torrance, CA
• Mission-driven and excited to help build a team working on national security’s hardest challenges

Bonus Points

• Prior experience working in a startup or high-growth environment
• Familiarity with DoD programs, TS/SCI clearance processes, or defense industry recruiting norms

All employees are granted long-term stock incentives as part of their employment as Castelion. All employees receive access to comprehensive medial, vision, and dental insurance, and the company offers three weeks of paid time off per year.

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.

ITAR Requirements:

• To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.

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.

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