The guru of Services Drafts Mark Witherspoon, PE Expert Machine Design and Analyses I am License Professional Engineer with over 20 years of experience in mechanical engineering and design. I have a BSME and an MBA. I have had may years of experience as both an engineer and a project manager. I have always been focused on complete product development for conception to supporting the product in the field. I am an expert in designing large machines and machine elements, weldmedments, FEA, CAD modeling, and control system design.