The hybrid optomechanical technologies (HOT) consortium will lay the foundation for a new generation of devices, which connect, or indeed contain, several platforms at the nanoscale in a single “hybrid” system. As hybrid interfaces they will allow to harness the unique advantages of each subsystem within a nano-scale footprint, while as integrated hybrid devices they will enable entirely novel functionalities. A particular focus will be on nano-optomechanical devices that comprise electrical, microwave or optical systems with micro- and nano-mechanical systems. Research in the past decade, in particular by European groups, has shown the significant technological potential that such nano-optomechanical systems can offer, in particular by establishing a new way in which optical, radio-frequency and microwave signals can be interfaced. The present consortium includes leading academic groups and industrial partners to explore the potential of these hybrid-nano-optomechanical systems. It will explore hybrid opto- and electro-mechanical devices operating at the physical limit for conversion, synthesis, processing, sensing and measurement of EM fields, comprising radio, microwave frequencies to the terahertz domain. These spectral domains open realistic applications in the existing application domains of medical (e.g. MRI imaging), security (e.g. Radar and THz monitoring), positioning, timing and navigations (Oscillators) and for future quantum technology. The research aims at specific technological application, with realistic operating conditions and seeks to develop actual system demonstrators. In addition, it will explore how these hybrid transducers can be fabricated within standard CMOS processing, and thereby be made compatible with current manufacturing methods. The HOT devices will thereby impact today’s technology and likewise address potential future need for the manipulation of quantum signals.