Principal Specialist, Materials Planning, SIOP

The Principal Specialist supports SIOP and manufacturing execution by using MRP and related systems to maintain accurate material positions and production plans. Responsibilities include creating bills of material, managing shelf-life-controlled materials, analyzing usage, and helping transition new products into production. The position works closely with supply chain, manufacturing, engineering, quality, program teams, and suppliers to resolve constraints and implement action plans. It also contributes to lean and continuous-improvement initiatives while influencing operational policies and factory decisions. This onsite Tucson role suits an experienced materials, production control, supply chain, or operations professional who can work across complex aerospace production environments and meet U.S. security-clearance requirements.