 He has worked with a number of prominent aerospace companies including Rockwell International, Gulfstream American, Sikorsky Aircraft, American Jet Industries and Bell Aerospace and has specialized in stress analysis and safety-of-flight certification of primary airframe structures and components.Since its publication, the textbook Practical Stress Analysis for Design Engineers has been adapted into a distance learning certificate course for practicing stress engineers.The emphasis of the course is on technical fundamentals and practical real-life examples of stress analysis, with less treatment given to the higher mathematical or derivative aspects of the subject.