We are seeking experienced Mechanical Design Contractors to join a high-priority engineering project in the South Bay/Silicon Valley region. Key Responsibilities: Create complex mechanical designs using NX CAD (Siemens NX). Work within TeamCenter for design data and lifecycle management. Design tooling, fixtures, machined parts, and mechanical assemblies. Collaborate on projects involving systems with 1000+ mechanical components. Apply best practices in DFM, GD&T, tolerance analysis, and FEA. Produce comprehensive 2D/3D CAD models, BOMs, and technical documentation. Contribute to electromechanical layouts and design of machined enclosures. Work closely with cross-functional teams in a secure, confidential environment.