On two separate occasions, a driver followed a woman he had spotted while on the job into a toilet, and peeped at her from an adjacent stall.
Indian national Kuldip Singh, 27, used his mobile phone to film the first woman changing. He was caught after his second victim discovered him in the toilet and raised the alarm.
Yesterday, he was jailed for three weeks after admitting to criminal trespass and insulting the modesty of his two victims.
The court heard that on Oct 13, Singh had arrived with a colleague at 50 Science Park Road to collect chemical waste.
He followed his victim, a 37-year-old technical writer, into the women's toilet but was caught after she spotted him and screamed for help.
Police later discovered in Singh's phone a video clip of someone changing.
Investigations revealed that some time in April, he had filmed an unidentified victim in her underwear in a toilet at Ngee Ann Polytechnic.
Deputy Public Prosecutor Sruthi Boppana said Singh had "boldly ventured" into women's toilets to intrude on his victims' privacy.
Pleading for leniency, defence counsel Sarbrinder Singh said his client had committed a foolish act.
The lawyer added that Singh was due to be married on Christmas Day but the plan was now off because of the case.
Singh, who pleaded guilty to two of four charges, could have been jailed for up to three months and fined up to $1,500 for each of two counts of criminal trespass. He faced up to a year in jail and a fine, for each of two counts of insulting his victims' modesty.
This article was first published on December 20, 2014. Get a copy of The Straits Times or go to straitstimes.com for more stories.