Sigma Motorworks was a development-stage American company that developed electric drive vehicles for the United States and European markets, with initial funding from private investors. Matias Gorfinkiel served as head of operations and Steve Kase as head of development. In 2009 the company announced the final construction stage of the Sigma GTE, an electric sports car prototype. It was built around the cockpit of a Ford Mustang, which provided seating…