Materials Management Supervisor

Date:  Sep 7, 2023

Marysville, WA, US, 98271-7864

Company:  WillScot | Mobile Mini
Req ID:  50256

At WillScot Mobile Mini (NASDAQ WSC), our 4000+ people are at the heart of everything we do. In addition to providing industry-leading pay and benefits, we provide opportunities for development and upward mobility, while investing in the communities we serve.


We are the undisputed leader in providing innovative flexible workspace and portable storage solutions, serving an incredible range of customers across all industries from 240+ locations across the United States, Canada, and Mexico.


Our values are our foundation. We’re constantly striving to diversify our teams to ensure we have the best and brightest talent. We’re deeply committed to creating an inclusive and equitable workplace where each person can contribute while being their authentic self. For more about WillScot Mobile Mini and who we are, click here.


Come build your future with us!



The Materials Management Supervisor owns all material purchasing, receiving, organization, and storage for their designated WillScot Mobile Mini branch.  Key areas of responsibility include coordinating all inventory counts, identifying variances, and rectifying to standard, to ensure flow of those materials meets delivery and operational goals.



  • Maintain a safe working environment and practice safe working habits, always.

Systems Tracking

  • Inventory all parts into SAP before issuing them to production areas, stoking point or other noted production areas.
  • Record and assess all materials quality, movement, and expenditure.
  • Lead all material cycle counts for valuated inventory, consumables, and non-valuated inventory.
  • Oversee the counting and/or measuring of incoming or outgoing materials to verify measurements against invoices, orders, or other records.
  • Verify all receipts and consumption are completed real time in the appropriate consumption and procurement modes.  
  • Generate key inventory reports directly from SAP and BI to reconcile on premises inventory to SAP reporting.
  • Monitor and enter into SAP all materials that are placed in service or delivery vehicle that will be consumed during a Service or D&I work order.
  • Responsible for tracking performance using departmental metrics, as well as organizing inventory records for future reference.

Materials Handling/Storage

  • Supervise all activities related to receiving purchased parts, material flow and servicing parts as needed.
  • Ensure designated area on branch grounds where vendors deliver materials is safely aligned with branch production workflow.
  • Act as branch “gatekeeper” for all inventory items; ensuring they are stored in a secure manner.

Process Improvement

  • Recommend solutions to existing processes to reduce waste and increase quality and quantity.

Forecasting/Inventory Management/Movement

  • Work with branch management to identify inventory needs manage the distribution of inventory.
  • Monitor inventory levels and be proactive in resolving inventory variances. 
  • Manage materials shipments, as well as continuously improving the unloading, receiving, and secure storing process for all materials.
  • Confirm that all materials that were consumed in the appropriate Work Order process are accurately reflected on the work order and accounted for.
  • Be proactive in resolving inventory variances. 
  • Catalog and track all branch to branch transfers of materials.
  • Manage all materials-related activities such as ordering and budgeting, as well as suggesting changes to storage and retrieval processes to maximize the use of company resources.
  • Develop, implement, and sustain a plan for which materials/supplies are to be purchased, in what quantities and at what times to ensure that the plan will be able to meet current and future customer demand at the lowest possible cost.   
  • Maintain inventories at optimal level without impairing branch productivity. 
  • Order materials as needed, recognizing lead times for delivery to ensure availability for production.


Required Education and Experience: Briefly outline the educational level, degree program, and experience required to perform the job.

  • High School diploma or equivalent is required. 
  • Proficient with inventory reporting systems; experience with SAP Materials Management system a plus.
  • Understanding of supply chain an inventory management.

Required Skills and Abilities: Briefly outline the specific skills and abilities necessary to perform the job.

  • Excellent organizational and planning skills.
  • Excellent verbal and written communication skills.
  • Excellent interpersonal skills and the proven ability to work well with all levels of management and staff in multiple locations.
  • Ability to influence with and without authority.

Preferred Education and Experience: 

  • Bachelor’s Degree
  • Prior knowledge and/or experience working within a warehouse. 

Physical Requirements                 

  • Able to lift up to 50 lbs. without strain
  • Ability to work outdoors in extreme weather conditions
  • Able to be on your feet up to 8 hours (daily)

Disclaimer: This posting describes the general nature and level of work performed and does not represent an exhaustive list of responsibilities, duties, or skills required. Collaboration and teamwork drive our success. Team members may be required to perform duties outside normal responsibilities from time to time as needed.


WillScot Mobile Mini provides equal employment opportunities to employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.


WillScot Mobile Mini embraces diversity and is committed to equal opportunity in all aspects of employment, including recruiting, hiring, promotion, termination, leaves of absence, compensation, and training. We are focused on building teams that include a variety of backgrounds, lived experiences, and skills.

The more inclusive we are, the stronger we will be!

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