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BESIX Watpac delivers landmark Defence aviation facility at RAAF Base Edinburgh
Delivering complex defence infrastructure
Appointed as design and construction partner by Renewal SA for the Australian Department of Defence’s Deep Maintenance and Modification Facility in April 2024, BESIX Watpac delivered the AUD 200 million development from early works through to completion, demonstrating its expertise in complex, high-security infrastructure.
Delivered on time and ahead of schedule, the DMMF reached practical completion in March 2026. The programme was driven by early design engagement, innovative delivery approaches and the smart use of digital construction methods.
A purpose-built aviation hub
At the heart of the development is a vast, purpose-built four-bay hangar (240 metres long, 60 metres wide and 25 metres high), designed to accommodate Boeing 737-variant military aircraft, including the RAAF’s P‑8A Poseidon and E‑7A Wedgetail fleets.
The facility also integrates workshops, warehouses, secure technical spaces and a dedicated tow-way connecting directly to the operational airbase.
BESIX Watpac completed the integration of this new precinct with RAAF Base Edinburgh through a highly specified, nearly kilometre-long tow-way tied into the existing runway. This new tow-way provides the capability for further developments at the DMMF site.
Delivering at this scale required precision engineering and rigorous project management. BESIX Watpac oversaw the installation of four bespoke hangar doors, each spanning 48 metres, alongside an 1,800-tonne structural steel frame and extensive concrete works.
Throughout the build, the team leveraged collaborative planning and digital tools to optimise sequencing and productivity, consistently achieving key milestones ahead of plan.
Investing in local capability
Beyond the build itself, the DMMF reflects BESIX Watpac’s commitment to local industry and workforce development. Around 450 jobs were created during construction, supported by strong engagement with South Australian subcontractors and suppliers. More than 60 apprentices and work experience students were also involved throughout delivery.
The facility is expected to sustain around 50 highly skilled roles in aerospace maintenance and engineering.
Strengthening sovereign capability
Now operational, the DMMF marks a step change in Australia’s sovereign Defence capability. For the first time, deep maintenance and major modification of key RAAF aircraft can be carried out domestically, strengthening national resilience.
 "Air Commodore Alison Macarthy (left), Air Vice-Marshal Gerry van Leeuwen AM, CSM, and Boeing Defence MD Amy List cut the ceremonial ribbon the official opening of the Deep Maintenance and Modification Facility at RAAF Base Edinburgh, South Australia.")
 "Defence personnel and contractors at the official opening of the Deep Maintenance and Modification Facility at RAAF Base Edinburgh, South Australia.")
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© Commonwealth of Australia, Department of Defence
