What is a quant trader?

http://www.onestepremoved.com/ Shaun Overton interviews Michael Halls-Moore, a quantitative developer. Mike jumped from postgraduate school straight into algorithmic trading, bringing all the academic expertise but having to figure out the real world of trading with other people's money. Mike talks about the differences between trading personal accounts and what the institutions look for in their trading strategies. http://youtu.be/Uw188vWQ2Hg