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Diona Pty Ltd with its team of experienced personnel have been undertaking projects in the utility infrastructure industry for over 25 years.

Diona Pty Ltd has a fully certified quality, safety and environmental management system which meets all the requirements of ISO 9001, AS4801 and ISO 14001 and are accredited service providers to AGL, Sydney Water, Telstra, TransGrid, Energy Australia and Energex.

Diona Pty Ltd specialise in the following infrastructure installations:

  • Gas pipelines and services
  • Power cables and cable jointing
  • Water and sewerage mains, including pumping stations
  • Telecommunication cable and conduits
  • Storm water pipe and pits, including water channels and culverts
  • Directional drilling and horizontal boring operations and installations.

Diona Pty Ltd are presently constructing a number of projects throughout NSW and Queensland, one of which includes the Sydney Primary Loop natural gas project.

Other key works currently being undertaken by Diona Pty Ltd include water and sewer relocations for the Sydney T Way, a 35km water main installation in Monto, Queensland as well as numerous cable installation projects throughout the Gold Coast and Brisbane.

In addition to Diona's extensive existing portfolio of infrastructure projects, works recently completed include:
  • 330KV Underground Electrical Cable, Picnic Point to Haymarket for Mitsui (J-Power)/ TransGrid
  • Rouse Hill Infrastructure Stage 3A and 3B Water and Sewer Mains
  • Potable water pipeline from Morisset to Warnervale
  • Rutherford to Singleton PE gas main installation


Diona Pty Ltd, with its highly qualified and experienced management team, skilled field personnel, and a large range of specialist plant and equipment, are building on reputation as utility asset owner's preferred contractor.

Whatever the asset - Diona Deliver!