BESIX Watpac Delivers Landmark Defense Aviation Facility at RAAF Base Edinburgh

Appointed as design and construction partner by Renewal SA for the Australian Department of Defense’s Deep Maintenance and Modification Facility in April 2024, BESIX Watpac delivered the AUD 200-million development from early works through completion. The DMMF reached practical completion in March 2026. The program was driven by early design engagement, innovative delivery approaches and the smart use of digital construction methods.

At the heart of the development is a vast, purpose-built four-bay hangar (240 meters long by 60 meters wide by 25 meters 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 and secure technical spaces.

The project team completed the integration of this new precinct with RAAF Base Edinburgh through a highly specified, nearly kilometer-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. The project team oversaw the installation of four bespoke hangar doors, each spanning 48 meters, alongside an 1,800-ton structural steel frame and extensive concrete works.Throughout the build, the team leveraged collaborative planning and digital tools to optimize sequencing and productivity, consistently achieving key milestones ahead of plan.

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.