Reliability Manager Jobs in Rancho Cucamonga, CA

At Golden West Packaging Group, our people are at the heart of everything we do. We believe that great work happens when employees feel valued, supported, and empowered to grow. As a company built on collaboration, innovation, and continuous improvement, we offer an environment where your ideas matter, your development is prioritized, and your contributions make a real impact. If you’re looking to build a meaningful career with a team that values integrity, accountability, and opportunity, we invite you to explore what it’s like to grow with Golden West Packaging Group.

The Storeroom / Materials Manager is responsible for leading and optimizing the maintenance storeroom, MRO inventory management, spare parts strategy, and materials processes that support maintenance and operations reliability. This role ensures the right parts, materials, tools, and supplies are available at the right time while controlling inventory costs and improving asset uptime.

The position oversees storeroom personnel, inventory accuracy, CMMS inventory governance, supplier coordination, and continuous improvement initiatives related to materials management and maintenance support.

Key Responsibilities

Storeroom & Inventory Management

• Lead daily storeroom and materials operations.
• Ensure accurate receiving, storage, issuance, and tracking of MRO inventory.
• Maintain proper inventory levels for:
  • Critical spares
  • Consumables
  • Maintenance repair parts
• Manage inventory optimization initiatives including:
  • Min/max levels
  • Reorder points
  • Inventory turns
  • Obsolescence reduction
• Ensure physical storeroom organization and housekeeping standards.

Spare Parts Strategy

• Develop and maintain critical spare parts strategies based on asset criticality and risk.
• Partner with maintenance and reliability teams to identify spare parts requirements.
• Standardize parts and reduce duplicate inventory.
• Support lifecycle planning for equipment spare parts.

CMMS & Inventory System Governance

• Manage inventory and materials data within systems such as CMMS and/or EAM
• Ensure accurate item master data, bin locations, and transaction processing.
• Maintain inventory accuracy and audit compliance.
• Support CMMS governance and materials reporting standards.

Maintenance & Operations Support

• Support maintenance planning and scheduling by ensuring timely parts availability.
• Coordinate materials staging and kitting for planned maintenance and shutdowns.
• Minimize downtime caused by material shortages.
• Support emergency maintenance response with rapid parts coordination.

Purchasing & Vendor Management

• Coordinate with procurement and suppliers to:
  • Source materials
  • Expedite critical parts
  • Improve lead times
  • Resolve shortages
• Evaluate vendor performance related to quality, delivery, and cost.
• Support contract and supplier optimization initiatives.

Leadership & Team Management

• Supervise storeroom personnel, inventory coordinators, and parts clerks.
• Develop team skills, accountability, and performance standards.
• Establish and monitor storeroom KPIs and daily management systems.
• Promote a culture of safety, organization, and continuous improvement.

Continuous Improvement

• Drive improvements in:
  • Inventory accuracy
  • Storeroom organization
  • Parts availability
  • Cost optimization
• Participate in Lean, TPM, and reliability initiatives.
• Support audit readiness and compliance activities.

Safety & Compliance

• Ensure compliance with safety standards for material handling and storage.
• Maintain OSHA and environmental compliance related to inventory management.
• Ensure proper storage of hazardous and regulated materials.
• Support internal and external audit requirements.

Required Qualifications

• High school diploma or GED required.
• Bachelor’s degree in Supply Chain, Business, Engineering, or related field preferred.
• 5–10 years of experience in industrial storeroom, materials, maintenance inventory, or supply chain management.
• Experience in manufacturing or industrial maintenance environments preferred.
• Strong experience with CMMS, ERP, or inventory management systems.
• Supervisory or leadership experience preferred.

Preferred Skills

• Strong inventory management and analytical skills.
• Understanding of maintenance and reliability processes.
• Knowledge of spare parts optimization and MRO inventory control.
• Leadership and team development capability.
• Strong organizational and communication skills.
• Proficiency with Microsoft Excel and inventory reporting tools.
• Knowledge of Lean manufacturing and continuous improvement principles.

Key Performance Indicators (KPIs)

KPI

                              Target Direction

Inventory Accuracy

                                       High

Stockout Frequency

                                       Low

Parts Availability

                                      High

Inventory Turns

                                Optimized

Emergency Purchases

                                      Low

Obsolete Inventory

                                Reduced

On-Time Parts Staging

                                    High

Storeroom Audit Score

                                    High

Reporting Structure

Reports To:

• Maintenance & Reliability Manager
• Supply Chain Manager

Direct Reports:

• Inventory Coordinator / Parts Clerk
• Storeroom Attendants

Work Environment

• Industrial manufacturing environment
• Combination of office and storeroom floor responsibilities
• Frequent interaction with maintenance, operations, and vendors
• May require support during outages or shutdown events

Success Profile

A successful Storeroom / Materials Manager is organized, data-driven, customer-focused, and operationally disciplined. They improve maintenance effectiveness and equipment reliability by ensuring strong inventory governance, accurate materials management, optimized spare parts availability, and efficient storeroom operations.