I'm assuming two things, 1) he's building/civils related and not O&G related and 2) is he perchance a Scot?
Not meant to be a slur, but a huge number of QS's are Scottish, or it seemed so back in my heydays. He could start with Meinhardt. I don't have any ideas what they are doing at the moment. It might be a little tight over here at the moment, what with the Circle line getting on near finishing. Means lots of project teams are coming up available as well, especially those with Asian experience. But, if he's got a suitable track record, he might just be able to pull something out of the hat. Obviously, not to forget the recruitment headhunters as well. Rather than trying to cherrypick, I'd just flood the HH sites as it costs nothing to get the CV out there. Have him also look at The Expat Network (British) and excellent with worldwide coverage including Asian contacts. I've used them many times and have met the owners from the UK.
If he's got steelwork experience (O&G, Refinery, etc) or Shipyard Experience he could look at the obvious KepFels, Sembawang Shipyard, and the like.
