Inventory Specialist – Weekend Shift

Why Castelion, Why Now 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. Inventory Specialist As an Inventory Specialist, you will support the movement, control, and accuracy of materials used across Castelion's manufacturing operations. You will be responsible for receiving material into inventory, maintaining accurate inventory locations, picking and kitting production hardware, completing system transactions, and ensuring material is available where and when Production needs it. The right person for this role is organized, detail-oriented, comfortable working within an ERP/MES system, and willing to be hands-on in a fast-paced manufacturing environment. You should be comfortable shifting priorities as production needs change while maintaining a high standard for inventory accuracy and material traceability. Responsibilities 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 material and quantities are accurately accounted for. Receive, put away, transfer, issue, and consume inventory while ensuring physical material movements are accurately reflected in the ERP/MES system. Maintain accurate inventory locations and ensure material is stored in designated and properly labeled areas. Perform 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. Maintain strict material-handling practices to prevent damage, contamination, loss, or loss of traceability. Support material staging and replenishment to production areas based on manufacturing priorities. Locate and resolve missing or incorrectly stored material and escalate inventory discrepancies when necessary. 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 Production, Engineering, Quality, Shipping & Receiving, and Supply Chain to resolve material issues and support production schedules. Support Shipping & Receiving and other Materials functions as operational priorities require. Follow all applicable safety, quality, export-control, and company procedures. Perform other Materials and Inventory tasks as assigned to support changing production requirements. Basic Qualifications High school diploma or equivalency certificate. 3+ years of experience in inventory control, warehouse Forklift certified Preferred Skills and Experience Ability to work the following shifts and overtime as needed to reach critical mission milestones Weekend Day Shift: 5:00 AM - 5:00 PM, Saturday - Tuesday Ability to lift 25 lbs. unassisted Lifting, standing, climbing, bending, grasping, sitting, pulling, pushing, stooping, stretching, and carrying are generally required to perform the functions of this position Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details. Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are re…

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