Tan is also strongly involved in civil society work, representing Singapore in numerous conferences and workshops around the world.
In December 2005, Tan directed Boxing Day: The Tsunami Project, a response to the tragedy of 2004, as well as Separation 40 with Kuala Lumpur theatre group Dramalab's Zahim Albakri, which won three 2005 BOH Cameronian Arts Awards including Best Director.
Mobile toured to Kuala Lumpur for a three-night run at The Actors Studio in Bangsar, and Japan for several performances in March 2007.
The play toured to Malaysia for stagings at The Actors Studio in January 2007, before being reprised as part of the M1 Singapore Fringe Festival 2007 at the National Museum Gallery Theatre.
The play was adapted into a film in 2015 by directors Tan Bee Thiam and Lei Yuan Bin, starring Adibah Noor.