Private company

Thiess Pty Ltd

Australian-based international mining services company

Thiess Pty Ltd is an international mining services company based in Brisbane, Australia. Established in the 1930s as Horn & Thiess, the company later became Thiess Bros and Thiess Contractors before being bought by Leighton Holdings in 1983.2 It was founded by Leslie Thiess.1 It is part of CIMIC Group.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

  • Industrymining1

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Thiess Pty Ltd is an international mining services company based in Brisbane, Australia. Established in the 1930s as Horn & Thiess, the company later became Thiess Bros and Thiess Contractors before being bought by Leighton Holdings in 1983.2

Corporate structure

Thiess Pty Ltd is part of a group headed by CIMIC Group. 14 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

  • CIMIC Group North Sydney, Australia
    • UGL 100% · North Sydney, Australia
    • Thiess Pty Ltd
    • Broad Construction Services Subsidiary
    • Canberra Metro Operations Subsidiary
    • Leighton Asia Subsidiary · Hong Kong
      • Leighton Contractors (Asia) Limited Subsidiary
      • Leighton India Contractors Private Limited Subsidiary
    • CGI3 PTY LIMITED Subsidiary · 100% · North Sydney, Australia
    • CIMIC FINANCE (USA) PTY LTD Subsidiary · 100% · North Sydney, Australia
    • CIMIC FINANCE LIMITED Subsidiary · 100% · Sydney, Australia
    • CPB CONTRACTORS PTY LTD Subsidiary · North Sydney, Australia

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

Founded by Leslie Thiess.1

Leadership

Who has led Thiess Pty Ltd, and when. Pick a name to see everywhere that person has worked.

Subsidiaries and ownership

Parent company

From Wikidata.1

Timeline

  1. 1983Acquired Acquired by CIMIC Group1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2