Does anyone know if there is an exam invigilation service available in Bangkok? I am doing some post-grad study, and have exams in Jan & Feb, and need to have someone to supervise me :-)

It might be best to contact your home country embassy, and ask if someone there wuould do it. If necessary, that person could sign some sort of statutory declaration, recognised in the home country, saying that you had sat the exam, that they had witnessed you doing it etc. etc.

There are a few Prometric testing centres all over Bangkok. Find out from your Uni or School if you can use these. I know Siam Computer and Language Centre is a Prometric testing centre.