Established in 1975 Hornsby Mazda Centre has been a Family Business since 1994. Hornsby Mazda Centre is part of the Hornsby A ... utomotive Group Pty Ltd. The owners Greg & Sharron Stewart believe in great service and investing in training our team to be the best that they can be. “Our company mission is to provide to all our customers the best vehicle sales and service experience. We will do this in a way that will foster the continuos improvement of our people and our company”. read more