Together we deliver

Business With Us

Accounts Payable

Invoices must show the Purchase Order number as stipulated in the Purchase Order terms and conditions.

Invoices that do not have the correct Purchase Order number will be returned for correction and re-submission.

Incorrectly submitted invoices will result in a delay in payment.

The standard Monadelphous payment terms for approved invoices is 30 days from the end of the month, in which the goods are received, conditional upon the invoice being presented to the correct address.

The original tax invoice must be forwarded to:

Accounts Payable
Locked Bag 450
Victoria Park, WA 6979


For suppliers to New Zealand projects:

Accounts Payable
PO Box 33156
Christchurch 8244


Accounts Payable Queries

If you have any queries relating to payment of an invoice please contact Accounts Payable on or (08) 9316 6255.


For a full list of Monadelphous Group Limited subsidiaries, please click here

Current active trading entities

Monadelphous Engineering Pty Ltd 

A.B.N. 43 010 305 923

Monadelphous Engineering Associates Pty Ltd

A.B.N. 52 008 861 836
Monadelphous Electrical & Instrumentation Pty Ltd  A.B.N. 33 092 951 043
Sinostruct Pty Ltd  A.B.N. 36 128 995 764
Monadelphous PNG Ltd  Company No. 1 – 52392
Moway Austasia Steel Structures Trading (Beijing)  Company Ltd Business Licence No 110000450074362
Monadelphous KT Pty Ltd  A.B.N. 97 059 743 878
Monadelphous Engineering NZ Pty Ltd

NZBN 9429041593585

M Maintenance Services Pty Ltd

A.B.N. 82 605 643 678

Monadelphous Energy Services Pty Ltd

A.B.N 38 081 037 121