Wyatt Chu, 39, was convicted in the ACT Magistrates Court this afternoon for using a carriage service in an offensive manner and unrelated firearm storage charges.

The victim's name and workplace have been supressed by the court.

Chu planted a surveillance camera under the sink in a disabled toilet to film the woman "for his own self-gratification" as she changed into gym clothes before leaving work last year.

The ACT Magistrates Court heard the woman noticed the camera, which was attached to the sink by Blu-Tack, when it fell on to the bathroom floor.

She raised the alarm with her supervisor and went home. Chu resigned the following day.

Chu told police he had brought the surveillance micro-camera, a receiver, cables and his personal laptop to work and had planned to film his boss in the toilet.

Special Magistrate Graeme Lunney in March found Chu guilty of the principle offence, ruling his intentions were clear.

"It was an offence for which he made a number of preparations in advance," he said yesterday.

"And, in doing so, it must have been obvious to him that if his actions were to be detected the consequences for the victim would have been very, very serious, having regard to the relationship of trust...existing or arising out of a relationship built up in the workplace."

In her submissions Commonwealth prosecutor Katrina Musgrove said Chu "transgressed all appropriate norms of workplace behaviour".

But defence barrister Ken Archer said his client's contrition and remorse were genuine, and the magistrate agreed.

Mr Lunney took into account the fact Chu subsequently sought professional counselling, and "found strength" from his church community.

The magistrate convicted the man, fined him $1100, placed him on an 18-month good-behaviour order and ordered him to perform 80 hours of community service.

Chu will also be assessed for and, if suitable, required to complete the adult sex offender's program.