Kevin Getz is kinda like those nerds you see on tv... expect he's not as smart... or on television. Really he's not a whole lot like them at all.
His knowledge is more centered around computers and video games. He's been a test subject for Aperture Science and has battled aliens along side the UNSC.
When it's time to get on the radio all of his useless talents work together like little bits of string tied end to end, allowing him to function properly on air.