The police union says an officer at the centre of a tasering scandal at Rockingham police station should not lose his job.

The Police Commissioner Karl O'Callaghan has served the 53 year old sergeant with a loss of confidence notice.

He was one of two senior officers stood down after claims they tasered colleagues as punishment or part of an initiation ritual.

Union President Russell Armstrong says the officer has had a lengthy and successful career with the WA police, and that should be taken into account when the case is reviewed.

"It's a serious incident and we don't condone the behaviour of the people at Rockingham and other officers, but I think the Commissioner should take into the account the 36 years and I believe it's his first offence."

The officer has 21 days to explain why he should keep his job.

The matter will then go through a review process before a decision is reached.

An internal investigation into the behaviour of the second officer is ongoing.