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 Lead – Weekend Shift 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 escalate 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 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. • Promote a culture of safety, accountability, teamwork, and operational discipline. • 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 operations, materials management, or a related manufacturing environment. • Prior experience providing day-to-day direction, training, or coordination of warehouse or inventory personnel. • Experience using an ERP, MES, warehouse-management, or inventory-control system. • Forklift certification or the ability to obtain forklift certification. • Demonstrated experience with inventory transactions, cycle counting, material staging, and inventory reconciliation. • Ability to lift 25 lbs. unassisted. • Strong organizational, communication, and problem-solving skills. • Ability to work independently, make sound decisions, and appropriately escalate issues. • Ability to work the following shift and overtime as needed to reach critical mission milestones: • Weekend Day Shift: 6:00AM- 6:00PM, Thursday- Sunday Preferred Skills and Experience • Experience in aerospace, defense, automotive, semiconductor, or other highly regulated manufacturing environments. • Experience with serialized, lot-controlled, shelf-life-controlled, or export-controlled material. • Experience leading cycle counts, inventory audits, 5S activities, or continuous-improvement initiatives. • Experience interpreting work orders, bills of material, pick lists, and manufacturing priorities. • Familiarity with lean manufacturing or material-flow principles. • Previous experience as an Inventory Lead, Warehouse Lead, Materials Lead, or equivalent. 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 required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice. Additional Eligibility Requirements This position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or applicable U.S. Government requirements. If the position is so designated, your employment in the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility requirements imposed by applicable law, regulation, executive order, or government contract requirements. You will be notified if and when such requirements apply. Affirmative Action/EEO Statement Castelion is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law. Castelion is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require a reasonable accommodation to complete an application, participate in the interview process, or otherwise participate in the hiring process, please contact hr@castelion.com. Requests for accommodation will be considered on an individual basis and handled in accordance with applicable law. Castelion is committed to fostering a workplace where employment decisions are based on qualifications, bu