Mandy Concepcion has worked in the automotive field for over 28 years. He holds a Bachelor's Degree in Electronics Engineering as well as an ASE Master & L1 certifications. For the past 19 years he has been exclusively involved in the diagnosis of all the different electronic systems found in today's vehicles. It is here where he draws extensive practical knowledge from his experience and hopes to convey it in his books, equipment, and gadgets he designs. Mandy designs and builds his own diagnostic equipment, DVD-Videos and repair software.