How long has diona been in business? Work with us. For over 40 years, Diona has partnered with leading asset owners to keep the water running, lights on and waste managed for Australian communities. Why Diona?Who are designdiona construction? Diona Construction Ltd. are one of the leading providers in the UK of complex civil engineering projects and delivery of turnkey telecommunications infrastructure.Why choose diona for your project? At Diona, we pride ourselves on our ability to self-perform. With a range of skilled personnel and specialised plant, we have the flexibility and depth to deliver complex infrastructure projects and react quickly to changes in scope.