Inventory Lead – Weekend Shift Torrance, CA Supply Chain

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.

As an Inventory Lead, you will lead weekend-shift inventory and material-flow activities supporting Castelion’s manufacturing operations. You will coordinate the movement, control, and availability of materials while ensuring accurate inventory transactions, proper material traceability, and timely support for Production. The Inventory Lead is a working lead who provides day-to-day direction to Inventory Specialists and material-handling personnel. This role is responsible for prioritizing shift activities, assigning work, resolving material issues, maintaining inventory accuracy, and communicating status and risks to cross-functional partners and leadership.

The ideal candidate is organized, detail-oriented, hands-on, and comfortable working in a fast-paced manufacturing environment. You should be able to lead through changing priorities while maintaining high standards for safety, quality, inventory accuracy, and material traceability.

Responsibilities

• Lead and coordinate daily inventory and material-handling activities for the weekend shift.
• Assign work, establish priorities, and adjust staffing and activities based on Production requirements.
• Serve as the primary weekend-shift point of contact for Inventory and Materials-related issues.
• Pick, organize, stage, and move raw materials, hardware, purchased components, machined parts, assemblies, and other production material.
• Pick and prepare kits in support of manufacturing work orders, ensuring required materials and quantities are accurately accounted for.
• Receive, put away, transfer, issue, and consume inventory while ensuring physical movements are accurately reflected in the ERP/MES system.
• Maintain accurate inventory locations and ensure material is stored in designated, properly labeled, and audit-ready areas.
• Perform and coordinate daily cycle counts, investigate discrepancies, and support inventory reconciliation activities.
• Maintain proper material identification, lot and serial traceability, and shelf-life controls as applicable.
• Monitor shelf-life-controlled inventory and maintain proper stock rotation, including FIFO requirements.
• Ensure strict material-handling practices are followed to prevent damage, contamination, loss, or loss of traceability.
• Coordinate material staging and replenishment to production areas based on manufacturing priorities.
• Locate and resolve missing, damaged, or incorrectly stored material and elevate unresolved discrepancies appropriately.
• Review inventory transactions and shift activity for accuracy and completeness.
• Support shift-start planning, end-of-shift handoffs, and communication of open issues, material shortages, and production risks.
• Train, coach, and support Inventory Specialists and other material-handling personnel on procedures, systems, safety, and best practices.
• Help identify process improvements that increase inventory accuracy, material availability, productivity, and responsiveness.
• Assemble and maintain racks, shelving, bins, labels, and other inventory storage systems.
• Operate forklifts, pallet jacks, carts, and other material-handling equipment as required.
• Maintain clean, organized, and audit-ready inventory areas using established 5S practices.
• Coordinate with…