Principal Specialist, Demand Planner (Onsite)

Date Posted: 2026-10-22 Country: United States of America Location: US-ND-JAMESTOWN-P1 ~ 2604 Highway 20 N ~ PLANT 1 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Must be authorized to work in the U.S. without the company’s immigration sponsorship now or in the future. The company will not offer immigration sponsorship for this position. The company will not seek an export authorization for this role. 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. We are seeking a Principal Specialist, Demand Planner to develop, coordinate, and align demand plans that support customer commitments, operational performance, and inventory objectives. In this role, you will collaborate with Product and Program Management, Business Development, Finance, Supply Chain, Operations, and customers to improve demand accuracy, align demand with supply capabilities, and support the Sales, Inventory, and Operations Planning (SIOP) process. Your mission is to develop and maintain a minimum 36-month rolling demand plan, improve forecast accuracy, identify risks and opportunities, and provide data-driven insights that support revenue, inventory, and gross margin objectives. Join us in supporting the future of aerospace through world-class demand planning and supply chain operations! This is an onsite role based at our Jamestown, North Dakota location. What You Will Do: Develop and maintain a minimum 36-month rolling demand plan as part of the SIOP process. Develop statistical forecasts for applicable products and measure demand error to improve forecast accuracy and minimize variation. Aggregate demand plans into value stream families and align stability zones and time fences with business requirements. Facilitate monthly demand reviews and participate in SIOP meetings to align demand and supply across the organization. Partner with Finance to ensure unit-level demand plans translate into accurate and credible financial plans. Ensure demand is accurately entered and maintained in ERP systems and aligned with aggregate demand plans. Communicate detailed and aggregate demand plans, including key assumptions, risks, opportunities, and changes in demand. Collaborate with Supply Chain and Operations teams to understand supply constraints and opportunities and align demand with available capacity. Prioritize existing orders and perform scenario analyses using quantitative and qualitative data to identify opportunities to improve revenue, inventory, and gross margin. Partner with internal and external customers, Product and Program Management, and Business Development to continuously improve demand visibility, planning accuracy, and customer delivery performance. Qualifications You Must Have: A University Degree or equivalent experience and minimum 5 years of prior relevant experience, or an Advanced Degree in a related field and minimum 3 years of prior relevant experience. Experience in demand planning, forecasting, supply chain planning, or a related field. Experience using Microsoft Office applications, including Word, Excel, and PowerPoint. Experience collaborating with internal and external customers and cross-functional teams. Experience managing multiple priorities, organizing work effectively, …

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