From Valve Developer Community
Zeph is an Admin on the UberMicro forums, a forum designed to help people with questions related to Source SDK and the Hammer Editor.
Zeph may not be the worlds greatest mapper, in fact he's never made a publishable map, but he has extensive knowledge into the Hammer Editor. He is very good at logic puzzles, and an excellent map optimizer.
If you would like any assistance regarding map making, feel free to head to the UberMicro boards. Chances are Zeph is bored at work and is checking the forums regularly, eager to help you!
Zeph lives in the UK, and works as a Physicist.