The interview was simple and brief. Not much is required out of this interview. It was more of a introduction to what this job entails so as to prepare you for it. Ask only if you are physically active as this job requires a lot of time to be spent outdoor.
I applied through a staffing agency. The process took 3 days. I interviewed at National Environment Agency (Singapore) in Jan 2017
Interview
It was a very simple and straightforward interview. There was only one interviewer, and he was amiable enough. Only three or four questions were asked. As this was only a temporary job, I asked him about permanent positions with NEA, and he willingly answered it.