Complex sentence: In 2003, three years before Ford left Formula One and a year before Cosworth was sold to Kevin Kalkhoven, White left Cosworth to start at Renault F1 the following year as engine technical director alongside Bob Bell (chassis technical director).
Split into simpler sentences: In 2003, three years before Ford left Formula One and a year before Cosworth was sold to Kevin Kalkhoven, White left Cosworth. The following year he started at Renault F1 the as engine technical director alongside Bob Bell (chassis technical director).