Recruiter - Human Resources Recruiting - Full Time

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.

Recruiting Coordinator

Castelion is scaling rapidly, and we are looking for a proactive, organized, and detail‑oriented Recruiting Coordinator to support our growing talent acquisition function. This role is ideal for someone who thrives in a fast‑paced environment, enjoys building strong relationships, and can take ownership of critical recruiting operations while contributing to the overall candidate and hiring manager experience.

You will partner closely with recruiting, HR, and hiring teams to coordinate and manage the end‑to‑end recruiting process. Schedule and coordinate interviews, meetings, and travel logistics for candidates and teams

Manage candidate communications, ensuring a positive and professional experience from application through offer

Support recruiters with sourcing, outreach, and pre‑screening as needed

Own administrative aspects of recruiting: offer letters, background checks, onboarding paperwork, and reporting

Maintain accurate data in applicant tracking systems and other HR tools

Partner with recruiting and HR leadership to optimize processes and improve efficiency

Contribute to special projects and initiatives to enhance the recruiting function

Bachelor's degree or equivalent experience

2+ years of recruiting, HR, or administrative experience (preferably in technical or high‑growth environments)

Must be able to work onsite at Castelion's Torrance, CA headquarters full‑time

Experience supporting technical or engineering hiring

Familiarity with applicant tracking systems (ATS) and recruiting technology

Leadership Qualities

Bias to Action and Creative Problem Solving . Successfully bring in applicable processes/concepts/materials from other industries to achieve efficiency gains. Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers. All employees are granted long‑term stock incentives as part of their employment as Castelion. All employees receive access to comprehensive medical, vision, and dental insurance, and the company offers three weeks of paid time off per year.

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.

S government‑issued security clearance, it may in the near future. S. government–issued security clearance is required. S. citizens are eligible for a security clearance.

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