The Principal Mechanical Engineer plays a critical leadership role at the intersection of design excellence and disciplined program execution. Serving as a Project Engineer for complex mechanical scope, this position owns technical direction from early concept through development, verification, and transition to production. You’ll be responsible for setting design intent, driving architecture and trade decisions, and ensuring solutions are robust, producible, and aligned with program objectives—all while balancing performance, cost, schedule, and manufacturing readiness in a highly regulated aerospace environment. This is a senior, principal-level individual contributor role designed for an engineer who thrives in ambiguity and leads through technical authority and influence. While hands-on technical depth remains essential, success in this role is defined by ownership of outcomes—integrating analysis, test strategy, risk reduction, and EVMS-based execution into a cohesive, executable plan. You’ll collaborate closely with Systems, Manufacturing, Test, Quality, and Supply Chain partners, provide clear technical insight to program leadership, and guide supporting engineers to deliver disciplined, high-impact results across the full program lifecycle.