"G4S Australia has had a business relationship with Differenz Systems for more than three years. During that time Differenz have developed and supported significant components of a critical and complex system utilised by our organisation on behalf of a State Government Department. These components that included a mobile hand-held device all had critical availability and performance objectives had very specific interfacing requirements that had to be met for the system to operate as expected. The system was implemented on time and has been operating for a number of years without any significant issues. We have found Differenz to be professional, reliable, and easy to deal with; importantly they have skills to deliver what we needed when we needed it."