Materials Planner (Onsite)

Date Posted: 2026-09-21 Country: United States of America Location: US-CA-SAN DIMAS-936 ~ 936-960 Overland Ct ~ OVERLAND Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract. Security Clearance Type: None/Not Required Security Clearance Status: Not Required At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense. This role will be working onsite in San Dimas, California. What You Will Do: Cross-collaborate to review inventory trends, drive actions to meet targets, and develop Material Planning (MP) parameters utilizing EMP/IE standards and enterprise policies. Provide MP parameter inputs to Master Data Planners including MRP types, minimum order quantities, and lot sizes. Support inventory forecasting, inclusive of input/output models and reason codes for inventory inaccuracy across Raw Materials, WIP, and Finished Goods. Manage entitlement levels, present inventory rollups and executive insights, and generate KPI analyses. Drive continuous improvement by eliminating process gaps, enhancing forecast accuracy, shortening cycle times, and strengthening cross-functional handoffs. Track performance against financial plans and provide inventory inputs to the SIOP process. Manage forecasting for production-planned purchased parts and planning strategies including special stock and Non-Conforming Material oversight. Review Shelf Life Expiration reports and drive action on items at risk. Assess ECN (Engineering Change Notice) effectivity by checking whether changes to materials or assemblies are captured, and identify what actions current inventory requires as a result. Assist Program Management with CBOM proposals by confirming inventory availability. Support Engineering with GIDEP part searches and usage/PO lookups during obsolescence reviews. Support the coordination and execution of the Sales, Inventory, and Operations Planning (SIOP) process, ensuring alignment between operational capability, inventory levels, and business goals. Analyze inventory trends, consumption data, and planning parameters. Travel up to 10%. What You Will Learn: How market trends and demand shifts affect material and inventory strategies. Advanced forecasting models including PIR oversight and scenario planning. EMP and IE policy application and refinement. PFEP development and inventory variance root-cause identification. Financial alignment through E&O review, reserve support, and inventory clinics. How materials planning integrates into end-to-end SIOP processes driving demand, supply, production, and financial outcomes. Qualifications You Must Have: Typically requires a University Degree and minimum 2 years of prior relevant experience or an Advanced Degree in a related field Experience in material planning, supply chain, or inventory control. Working experience of SAP MRP parameters and planning strategies. Must have a track record of clear communication and successful collaboration with cross-functional partners. Proficiency with Excel and reporting tools such as Tableau or Power BI. Qualifications We Prefer: Understanding of EMP/IE standards, PFEP frameworks, and inventory entitlement. Aerospace or high-mix manufacturing experience. Experience executing E&O reviews, inventory clinics, or ABC strata alignment. What We Offer Some of our competitive benefits package includes:   Medical, dental, and vision insurance   Three weeks of vacation for newly hired employees   Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option   Tuition reimbursement program  Student Loan Repayment Program   Life insurance and disability coverage   Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection  Birth, adoption, parental leave benefits  Ovia Health, fertility, and family planning   Adoption Assistance   Autism Benefit   Employee Assistance Plan, including up to 10 free counseling sessions   Healthy You Incentives, wellness rewards program  Doctor on Demand, virtual doctor visits   Bright Horizons, child and elder care services  Teladoc Medical Experts, second opinion program   And more! Learn More & Apply Now! ​ Operations, Supply Chain and EH&S: The next chapter of our future as an aerospace company is here, and we are excited about what this means for our employees and customers! Get onboard the Collins Aerospace Operations team and play a part in managing our innovative products from inception to delivery. The Operations team continues to grow and aims to strengthen the connection of Manufacturing Operations, Supply Chain and Environment, Health & Safety (EH&S) across Collins Aerospace. In this dynamic environment, you will have the opportunity to network across our businesses and functions, all while improving the productivity, quality and efficiency of our operations worldwide.  Collins Aerospace, a RTX company, is a leader in technologically advanced and intelligent solutions for