Staff at the Tatura headquarters were told of the process last week.
All senior executive positions will be declared vacant and the positions are expected to be filled by July.
G-MW’s new managing director, civil engineer Charmaine Quick, promised there would be changes at the corporation when she arrived in February.
The action follows a strategic report commissioned by the water minister last year and the replacement of senior governance positions during the past six months.
In a statement to Country News, Ms Quick said the organisation needed to change to adapt to the changing needs of customers.
‘‘G-MW cannot retain the same business model going forward,’’ she said.
‘‘It is no longer aligned with the challenges facing the region and the organisation.
‘‘I have declared all our executive management positions at G-MW vacant.
‘‘These have been realigned to best serve our customers’ needs and will be advertised, with the best applicants from within and outside G-MW encouraged to apply,’’ Ms Quick said.
‘‘From July, a new leadership structure will be adopted at G-MW to deliver on strategic outcomes for our customers.’’