ATM jobs (but not ATCO positions) - where to look, esp. Asia?

[11K-AVML]

Hi, I'm currently working for an ANSP in Europe as an analyst (research into current and future operations rather than a financial analyst) and I'm keenly searching for opportunities in this area to further my career.
I seem to be able to find lots of vacancies advertised for ATCO's but I'm a bit lost at searching for analysts in ATM {as though I'm looking in the wrong places, but maybe that's just the market}.
Has anyone got any suggestions on where's good to do some job hunting for this line of work?
I'm based in the UK but keen to head over to Asia (Singapore or Japan) if possible, making my search all the harder. I've got JobsDB, FlightInternational, ATCEvents, and a few companies' websites, e.g. AirServicesAustralia (although not quite Asia...).

There seem to be lots of general recruiters but few that specialise in aviation (let alone ATM). Can anyone give me a few tips on places to look? Unfortunately I know no-one in the industry in this part of the world.

Thank you .