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Inventory Specialist

Torrance, CA, USA
Full Time On-site

Summary

Job Description

As an Inventory Specialist, you'll play a critical role in maintaining the integrity, accuracy, and efficiency of inventory operations across physical and system environments. Working closely with Purchasing, Production, and Supply Chain teams, you will ensure that materials are accurately received, tracked, stored, and issued to support production schedules.

This role requires strong attention to detail, hands-on execution, and a continuous improvement mindset. You will be responsible for ensuring that physical inventory aligns precisely with system data to enable reliable production planning and operational excellence in a fast-paced manufacturing environment.

Responsibilities

  • Track, receive, identify, and document inbound inventory in accordance with company procedures.
  • Coordinate shipping activities and ensure outbound materials are accurately processed and documented.
  • Maintain alignment between physical inventory stock levels and corresponding quantities and locations within the ERP system.
  • Own inventory accuracy by executing and maintaining a robust cycle count program.
  • Perform regular physical inventory audits and reconcile discrepancies between physical and system records.
  • Collaborate with Purchasing, Production, and cross-functional stakeholders to investigate and resolve inventory variances.
  • Identify root causes of discrepancies and implement corrective actions to prevent recurrence.
  • Support daily production kitting and ensure the production floor is supplied with required materials per the monthly production plan.
  • Optimize physical storage locations to improve space utilization, material flow, and accessibility.
  • Maintain compliance with company procedures, documentation standards, and security requirements.
  • Lift, carry, handle, and transport materials up to 50 lbs unassisted as required.
  • Support continuous improvement initiatives focused on inventory control, process efficiency, and data accuracy.

Basic Qualifications

  • High school diploma or vocational school diploma.
  • 3+ years of experience in Material Management, Manufacturing Operations, or a related field.
  • Experience working in ERP systems within a manufacturing environment.
  • Strong proficiency in Microsoft Office tools including Word, Excel, and PowerPoint.
  • Advanced Excel skills with the ability to analyze and reconcile data.
  • Strong written and verbal communication skills.
  • Self-motivated individual with a hands-on approach and a demonstrated continuous improvement mindset.
  • Ability to obtain and maintain an active U.S. Secret security clearance.

Preferred Skills and Experience

  • Experience supporting inventory operations in aerospace, defense, or high-tech manufacturing environments.
  • Experience driving process improvements in inventory control or warehouse operations.
  • Familiarity with structured cycle count programs and audit readiness practices.
  • Experience supporting production kitting and material flow optimization.
  • Professional certifications in supply chain or operations (e.g., APICS) are a plus.

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.

About Castelion

Castelion

Castelion is one of the fastest-rising defense technology companies focused on building affordable, rapidly deployable hypersonic strike systems for the U.S. military. Founded by former SpaceX leaders, the company is working to modernize how advanced weapons are developed and manufactured—using rapid iteration, vertical integration, and scalable production to deliver next-generation deterrence capabilities faster than traditional defense programs. Castelion’s mission centers on restoring America’s ability to field advanced military technology at speed and scale.

For job seekers, Castelion offers the opportunity to work directly on some of the most advanced technologies in national defense, including propulsion systems, avionics, flight software, guidance and navigation, missile systems, and advanced manufacturing. The company hires across aerospace engineering, embedded software, manufacturing, test engineering, avionics, cybersecurity, and operations—making it especially attractive to engineers, builders, veterans, and mission-driven professionals who want hands-on ownership of real hardware.

Unlike traditional defense contractors, Castelion operates with a startup-style engineering culture modeled after rapid aerospace development environments. Employees work closely with flight hardware, testing, and production systems in a fast-paced setting where speed, accountability, and execution are prioritized. The company openly emphasizes a builder mentality—giving team members the chance to own major projects and contribute directly to systems with national security impact.

As the U.S. military increases investment in hypersonic weapons, missile modernization, and scalable deterrence capabilities, Castelion continues to grow rapidly through major government contracts and manufacturing expansion. For professionals seeking a high-growth aerospace and defense company where they can help shape the future of national security technology, Castelion is quickly becoming one of the most exciting employers in the defense innovation ecosystem.

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