Wigan Council is joining forces with two other authorities in a bid to save millions of pounds.
Wigan is already sharing some services with Trafford and Stockport Council and now they are to share an HR and payroll system.
The project, entitled SWiTch, will be hosted by Wigan Council, and is expected to make savings of more than £2m for the three councils in the first two years of its use.
The system will handle records for more than 30,000 employees and will operate on three separate databases.