According to Tay's LinkedIn profile, she joined Uber a year ago, overseeing the comms function for APAC based out of Singapore.
Tay's departure marks the latest in a string of senior exits from Uber's comms team. Last year Andrew Noyes, head of corporate comms, left, followed by EMEA head of comms Rachel Channing and EU head of policy Dominick Moxon-Tritsch.
Last month PRWeek reported that Uber has hired Gareth Mead from Virgin Media as head of comms EMEA, while moving its PR function back in-house.
Uber has also put its public affairs account out to pitch. The work is currently split between Westbourne in the UK and FIPRA International in Europe.
Uber declined to comment.