PARIS -- Jérôme Kerviel is accused of breaking into computer systems to make risky trades that cost Société Générale SA billions. Now, the former trader has a new job -- in computer services.

As prosecutors investigate his role in the world's biggest-ever trading scandal, Mr. Kerviel has started working at Lemaire Consultants & Associés, an information-technology consultancy specializing in IT network installation and security, according to his lawyer, Guillaume Selnet.

Mr....