德勤

Deloitte is one of the 'Big Four' global professional-services firms, founded in 1845 by William Welch Deloitte in London and operating today as a Swiss-verein network with member firms in 150+ countries and ~460,000 staff worldwide. The Australian member firm (Deloitte Touche Tohmatsu) has offices in Sydney, Melbourne, Brisbane, Perth, Adelaide, Canberra and regional centres, with FY25 (ended Jun 2025) revenue of AUD 2.55B (-8% YoY) and approximately 11,150 staff after cutting 900+ roles and ~100 partners during the FY25 consulting downturn (Consultancy.com.au / The Nightly 2025). Primary customer segments are ASX-200 corporates, federal + state government agencies, and large financial institutions. Service lines are split into Audit & Assurance (FY25 AUD 511M, -9%), Technology & Transformation (~AUD 1B, -14%), Strategy/Risk/Transformation (AUD 652M, -3%) and Tax & Legal (AUD 346M, +slightly) per Deloitte's FY25 financials. The technology & transformation practice — Deloitte Digital, cloud engineering, AI/data, cybersecurity — is the largest single revenue line and the main entry point for software engineers, cloud architects and data scientists. CEO Joanne Gorton has publicly guided to a return-to-growth posture in FY26.