Mass Effect - Classes @ IGN

IGN has an article called The Classes of Mass Effect Revealed, with a short description of each said class in the following format:

Infiltrator

BioWare says: Infiltrators combine combat and tech abilities, and specialize in killing or disabling enemies at long range. Infiltrators are trained to use OmniTools, but the focus is on decryption and offensive abilities rather than healing. They can train with pistols or sniper rifles, and can learn to wear medium armor.

IGN says: Infiltrators are Engineers with a kick. Along with long range sniping abilities, we look forward to utilizing stealth, as the name implies. We're not sure what stealth elements will make it in to Mass Effect, but at the very least our Infiltrator sounds like he can pick a few locks.