John Duffner Constantly Learning.... The history of this business is built on a tradition of service, technical expertise, and innovative thinking to meet the needs of small to medium size businesses and individuals in a rapidly changing world. Experience and academic credentials:  John Duffner teaches accounting; has been doing tax preparation for many years; has advised various buisnesses in the areas of software implementation; process and systems applications.  I provide you with the expertise of larger firms, while my commitment to superior customer service offers a personal, one-on-one approach. Education:  BS in Aeronautics from St. Louis University (combination of Aeronautical Engineering and Business Program); MBA from Pepperdine University. Licenses:  California Tax Preparer; Californai Real Esate Broker.