Principal Specialist, Aftermarket Demand Planner (Onsite)

Date Posted: 2026-07-23 Country: United States of America Location: US-CA-CHULA VISTA-B107 ~ 850 Lagoon Dr ~ BLDG 107, Mail Zone 1-C Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The company will offer immigration sponsorship for this position, if needed.​ 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. Join us and help shape the future of aerospace and defense. We are looking for an Aftermarket Demand Planner to join our team at our Aerostructures headquarters in Chula Vista, CA who has experience in Materials Management, Demand Planning and Strategic Analysis. You will manage demand planning strategies across various product lines and support the team with strategic reporting & analysis tasks. This position works in a primarily onsite capacity.    What You Will Do Manage planning strategies and ERP requirements across various aftermarket product lines to achieve 96% on-time delivery to customer request date Drive continuous improvement initiatives to ensure inventory and service level targets are met Develop and implement technologies, processes, and tools for inventory management, demand planning, and business process automation Optimize part segmentation to ensure make-to-stock strategy aligns with inventory and service level objectives Develop effective forecast models based on demand patterns, product lifecycle knowledge, and available market intelligence Extract and analyze datasets to generate reports that support analytical needs of the organization to drive strategic decisions Possess ability to display complex data in a simple, intuitive format and to present findings in a clear and concise manner Communicate effectively with other Aftermarket or OE stakeholders Provide recommendations on how to utilize available planning and demand data for inventory optimization Development of data visualizations using PowerBI, Tableau or other similar tools Qualifications You Must Have Typically requires a University Degree or equivalent experience and minimum 5 years prior relevant experience, or An Advanced Degree in a related field and minimum 3 years experience ERP experience Experience with Continuous Improvement tools and concepts Experience with materials management concepts and processes Experience with demand planning, service level and inventory optimization with intermittent historical demand Experience with cost/benefit and return on invested capital financial analyses Able to travel up to 5% domestically and internationally (when circumstances permit) Qualifications We Prefer Experience with SAP, SAP IBP, or other ERP/planning systems Degree in Statistics, Economics, Business, Supply Chain Management, or related fields Experience with PowerBI (usage and development of reports) Experience with Business Warehouse, IBP, Bex, Webi Knowledge of Lean, Six Sigma, ACE, or CORE Experience with SIOP (or S&OP) concepts and processes Experience with Planning and/or Master Scheduling in a manufacturing environment Experience with statistical forecasting and forecast accuracy measurement Experience with developing and enhancing reporting via various database tools such as Access, SQL, WEBI, SAP BW Experience with assembling reports based on quantitative data analysis and presenting results to senior leadership Learn More & Apply Now 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!  Relocation assistance may be available WE ARE REDEFINING AEROSPACE. Our Advanced Structures team leverages advanced materials and additive manufacturing to develop complex interior and exterior solutions. These solutions ensure structural integrity of the aircraft, help aircraft take off and land, stay trim in the air, move forward, carry cargo and conduct rescues. We delight our customers with superior products and best-in-class service. Our global team is committed to continuous improvement – we work hard to make our solutions lighter-weight, stronger and more technically advanced, so that plane travel can be safer, more affordable and more sustainable in the years to come. We are looking for the best and brightest to fly and land with us!   * Ple