The chief executive of a Wheatbelt shire has resigned weeks after being told not to attend work while an investigation into workforce-related issues was being undertaken.

The Shire of Brookton initiated the investigation in June and requested chief executive Darren Friend step down for the duration of the inquiry.

At the time, the shire said in a statement an initial inquiry had highlighted human resource and workforce issues within the organisation and had elected to investigate them further.

Shire president Kym Wilkinson confirmed the investigation had now concluded, but would not comment on the outcome.

In a statement, the council said Mr Friend had resigned effective from August 18.

It said the council had appointed deputy chief executive Evelyn Arnold to act in the role and would begin looking for a permanent replacement in the near future.

Ms Arnold is due to leave the shire in the coming months after resigning for unrelated issues prior to the investigation being announced.