Inventory​/Plumbing Apprentice

Description Company Profile:

Plant Prefab is a certified B Corp and Benefit Corporation that manufactures customized prefabricated building components—enabling general contractors, developers, and homebuilders to construct high-quality architectural homes faster, more reliably, and more affordably. From its $40M, 270,000-square-foot automated factory in Tejon Ranch—the first in the nation purpose-built to produce both modular and panelized housing components at scale—Plant can manufacture 1,000–2,000 homes per year.

Its patented Plant Building System™ combines automation, design flexibility, and sustainable construction to deliver superior quality and efficiency compared to traditional building methods. Plant brings extensive experience in fire-resilient construction and is currently involved in dozens of rebuilding projects comprising dozens of homes in Altadena, Pacific Palisades, and Malibu.

Plant Prefab is seeking an Inventory/Plumbing Apprentice to support both plumbing installation activities and the organization, control, and availability of plumbing materials, tools, and spare parts within the factory. This position provides an opportunity to develop hands‑on plumbing skills while gaining experience in inventory management, material tracking, and ERP‑based inventory systems. The Inventory/Plumbing Apprentice will work closely with the Plumbing, Maintenance, Warehouse, Purchasing, and Operations teams to ensure plumbing materials are properly received, organized, inventoried, staged, and available to support production.

The position will also assist with plumbing installation activities within Plant’s modules and panels under the direction of the Plumbing Supervisor. The ideal candidate is organized, detail‑oriented, mechanically inclined, willing to learn, and able to work effectively in a fast‑paced manufacturing environment. All work must be performed safely and in accordance with Plant Prefab’s quality standards, policies, procedures, applicable building codes, and OSHA requirements.

The position will be based at our Tejon Ranch, CA facility and report to the Operations Manager and Plumbing Supervisor. This is a temporary position with an expected duration of four months.

• Assist experienced plumbing personnel with plumbing installations and repairs while developing knowledge of proper plumbing methods, techniques, and applicable codes.
• Learn and apply proper pipe measuring, cutting, fitting, connecting, and installation techniques.
• Assist with testing plumbing systems and identifying leaks, defects, or installation issues.
• Complete work efficiently while minimizing material waste and spoilage.
• Maintain a clean and organized work area and properly care for tools and equipment.
• Follow all Plant Prefab quality assurance procedures and participate in continuous improvement initiatives.
• Identify non‑value‑added activities and communicate opportunities for improving plumbing processes.
• Perform other plumbing‑related duties as assigned.

• Organize and maintain plumbing inventory, materials, tools, equipment, and spare parts in designated storage locations.
• Maintain an organized and clearly labeled plumbing inventory area.
• Assist with establishing and maintaining standardized labeling, bin locations, and storage systems.
• Receive, inspect, count, and properly store plumbing materials and components.
• Stage and distribute plumbing materials to production areas as needed.
• Maintain accurate inventory records and report discrepancies, damaged materials, shortages, or excess inventory.
• Perform routine cycle counts and physical inventory checks.
• Assist with identifying obsolete, excess, duplicate, or damaged inventory.
• Monitor frequently used plumbing materials and communicate replenishment needs to the appropriate personnel.
• Work with Purchasing, Warehouse, and Plumbing personnel to ensure critical plumbing materials are available when needed.
• Help maintain accurate item descriptions, part numbers, categories, and inventory locations.
• Support efforts to reduce material waste, stockouts, and excess inventory.