450+ people from the following 130 companies attended Mainstream 2017.

ABB Enterprise Software
Aggreko Australia
Aquip Systems
ARMS Reliability
Aroona Alliance - Water Corporation of WA
ASC AWD Shipbuilder
ATCO Gas Australia
Aurecon Australia
Ausenco Rylson
Australian Department of Defence
B.E.Campbell (NSW)
Babcock (NZ)
BAE Systems Australia - Maritime
BCDS Solutions
Beca Australia
Beca Group NZ
Bega Cheese
BHP Iron Ore
BHP Mitsubishi Alliance Coal Operations
BHP Nickel West
BlueScope Steel
Botanic Gardens & Centennial Parklands
Bournemouth University (UK)
BPD Zenith (AUST)
Bureau Veritas Asset Integrity and Reliability Services
Bureau Veritas Australia
CBH Group
City of Perth
Coca-Cola Amatil (Aust)
Contact Energy (NZ)
CPS Conveyors
CS Energy
Defence - CASG
Devondale Murray Goulburn
Emerson Automation Solutions
Engineering & Maintenance Solutions
Enterprise Improvement Solutions
Entrada Consulting
Fisher & Paykel Healthcare (NZ)
FleetPartners Australia
Forestry Corporation of NSW
Fortescue Metals Group
GBF Underground Mining Company
GE Digital
Gladstone Area Water Board
Glencore Coal
Glencore Coal Assets Australia
Gold Fields Australia
GVS Reliability Products
Hansford Sensors (UK)
Hanson Australia
Holcim (Australia)
Horizon Power
Icon Integration
Iluka Resources
Intergraph Corporation (USA)
Jemena Limited
LyondellBasell Australia
Main Roads Western Australia
Meridium International
Methanex New Zealand
Metro North Hospital and Health Service
Modus Cooperandi (USA)
Monash University
Monsanto Company (USA)
Nestle Australia
New Hope Group
New Hope Group - Acland Minesite
New Zealand Defence Force (NZ)
New Zealand Steel (NZ)
Newcrest Mining
Norbar Technical Services
Norske Skog (Australasia)
Northparkes Mines
OpenText Australia
Optical Motion Technologies
Orica Australia
Orica Australia (IDN)
Orora Beverage Cans
Orora Paper & Recycling
Pall Australia
Palm Crest Consultants
Pan Pac Forest Products (NZ)
Pilbara Ports Authority
Port Kembla Coal Terminal
Prometheus Group
Quadrant Energy
Queensland Health
Queensland Sugar
Queensland Sugar - Mackay Bulk Sugar Terminal
Queensland Urban Utilities
RDI Technologies Inc (USA)
RedEye Apps
Revisia (NZ)
Ridley Corporation
Rio Tinto Iron Ore
Rockfield Technologies Australia
Roy Hill
SA Power Networks
Sandvik Mining and Sandvik Construction
Sanofi (USA)
SECORA Consulting Australasia
South32 Worsley Alumina
Spotless Group
Stanwell Corporation
Talison Lithium
Toyota Motor Corporation Australia
Transdev WA
TRHServices (NZ)
University of Western Australia (UWA)
Veolia Water Network Services
Vesta Partners
Viziya Australia
Voice Interface Design
Western Australia Police
Western Power
WesTrac Pty
Woodside Energy
Worsley Alumina