Nigel Stepney was a British mechanic. He worked for several teams in Formula One before being appointed chief mechanic at Ferrari. He became a central figure in the 2007 Formula One espionage controversy. Stepney was latterly team manager for Sumo Power.

The 2007 Formula One espionage controversy, also known as Spygate and Stepneygate, was a set of accusations among Formula One racing teams that confidential technical information had been passed between them. It involved the McLaren, Ferrari and Renault F1 teams.