ONDM 2019 will address cutting-edge research in established areas of optical networking as well as their adoption in support of a wide variety of new services and applications. This involves the most recent trends in networking including 5G and beyond, Internet of things, big data and network data analytics, cloud/edge computing, content delivery, autonomic networking, Artificial Intelligence assisted networks, visible light networks, quantum secured networks, etc. that drive the need for increased capacity, efficiency, flexibility and adaptability in the functions that the network can perform. These can be achieved developing new disaggregated optical network architectures, exploiting and integrating novel multidimensional photonic technology solutions as well as adopting open hardware and software platforms such as software defined networking (SDN), and network function virtualization (NFV) to allow support of new business models and opportunities. The scope of the conference includes but is not limited to the following topics: