The driver was last at work on 27 March, had his rest day on 28 March and tested positive on 31 March when he visited a doctor, SMRT said.
A new pop-up care centre at Downtown East aims to assist private-hire and taxi drivers impacted by the COVID-19 outbreak.
The Transport Ministry is looking into converting cabbies and private-hire drivers into temporary transport ambassadors amidst the COVID-19 crisis.