Multiplex

Builds large data centres across Australia for NEXTDC and GreenSquareDC, including the 350 MW S4 Sydney campus at Horsley Park.

HQ AU Asia-Pacific

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On the record

10 sourced facts
Regions Where the sources show the company building: regions named in its own pages plus the locations of its listed reference projects. Not a promise of service everywhere.
Asia-Pacific 1
Reference project MW Headline megawatts of the named reference project, as its source states them. Planned, contracted and delivered figures are mixed; the Reference project capacity field on each company page carries the basis. Never a company total.
350 1
Disclosed clients Clients, operators or tenants the source names, as short names. Their roles are under Client context. Never an inferred identity.
NEXTDC, GreenSquareDC 1
Client context The source's own wording on the named parties and their roles, for example tenant, owner or end-user, and any limit on the engagement.
Six-year relationship with NEXTDC across Perth, Brisbane and Sydney; engaged on S4 initial design in April 2022, Early Contractor Involvement from mid-2024 1
Reference project A named or confidential project from the company's own page. One project, not the whole portfolio.
NEXTDC S4 Sydney, Horsley Park 1
Reference project capacity and basis Source-reported project capacity with its qualifiers: electrical or IT basis, planned or delivered, the contractor's scope.
350MW planned 1
Reference project location Where the project sits, as published. Not the headquarters.
16 Johnston Crescent, Horsley Park, Western Sydney, NSW, Australia 1
Reference project status Milestone and date at the source. A historical announcement does not prove completion.
Under construction (works began March 2026) 1
Completion or scheduled delivery Actual completion where stated, otherwise a labelled target.
Mid-2027 1
Portfolio project count Count and scope as reported, keeping any plus sign and client limits.
NEXTDC S2 Sydney (Macquarie Park); S3 Sydney stages one and two (Artarmon); S6 Sydney (Artarmon); expansions at B2 Brisbane (Fortitude Valley) and P1 Perth (Malaga); GreenSquareDC WAi1, Belmont, Perth (96MW) 1

A project figure belongs to that project. It is not a company total, and a planned or announced figure is not a delivery. Fields the company has not published on the pages we read are left out.

Sources

  1. IT Brief Australia: Multiplex starts construction on NEXTDC's S4 Sydney accessed 2026-11-11
  2. iTnews: GreenSquareDC signs Multiplex for data centre build accessed 2026-11-11

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