Basic Qualifications for Engineer Structural - Level 4. Bachelor's degree in a Science, Technology, Engineering or Mathematics (STEM) discipline from an accredited university with a minimum of 10 years' experience to include a background in aerospace structural analysis; OR Master's degree in a Science, Technology, Engineering or Mathematics (STEM) discipline from an accredited university and 8 years' experience to include a background in aerospace structural analysis; OR Ph. Responsibilities for Engineer Structural - Level 4. Performing static, dynamic, and DaDT structural analyses of metallic and composite airframe structure, mechanical systems, and equipment, by hand and by using the automated methods and procedures approved for the program.