Duties and Responsibilities include but are not limited to the following: Create accurate 3D CAD models and engineering drawings of mechanical, electro-mechanical components and assemblies in NX IAW ASME Y14.100 Engineering Drawing Practices, ASME Y14.5, Dimensioning and Tolerancing, ASME Y14.41, Digital Product Definition Data Practices, IAW Northrop Grumman Principles and Operating Practices. Basic Qualifications for a Senior Principal Design Checking Engineer: Bachelor's degree with 8 years relevant Experience; 6 Years with Masters; 4 years with PhD; an additional 4 years of experience is required in lieu of a degree.