Information is undoubtedly one of the most valuable resources for any progressive organisation around the world. In that case both inter- and intra-information sharing is key to the success and growth of social and economic development. Meanwhile, public organizations usually have mixed or what is sometimes referred to as heterogeneous computing environments through which information is processed. However, there are essential elements that need to be taken into account to optimally harness the full potential of information systems interoperability. These include infrastructure, methods, models, and approaches in a complex yet achievable manner. This paper attempts to explicitly unveil the untapped opportunity emanating from systems interoperability and recommending means and ways to achieve systems interoperability