Hi,
DSO city now under construction here in Dubai. Nowadays you can see the main building if you coming from Arabian Ranches to Midriff at Emirates road, it will be in your right hand.
But I know the administration offices for DSO. It's on Dubai Airport Free Zone (DAFZ), I'm working in a company at the same free zone.
I will bring their tel. and will send it later on.
Thanks.