Thank you very much for your indepth insights!

Both of you have definitely convinced me not to work in DSTA due to my mismatch of skillset. I am so glad to be able to consult you about this. I guess I am slightly insecure about not having any job now, and over reacted to this interview chance. Though I only just graduated Nov/Dec 2014.

I think I would not go the interview then? I could use this time to look for other jobs in the private sector.

Thanks so much for your help!