Mercedes' technical director Bob Bell will leave the Formula 1 team at the end of this season.
The former Renault technical chief, who was part of Fernando Alonso's successful back-to-back world title campaigns for the French manufacturer in 2005-06, resigned from his role at Mercedes in December last year.
He will leave the Brackley-based team in November to pursue "new challenges outside the company", according to an official statement from Mercedes.
The squad will scrap the role of technical director when Bell, who has held the position since April 2011, leaves.
Executive director (technical) Paddy Lowe will assume Bell's responsibilities as part of a streamlined structure at Mercedes.
Bell began his career in F1 as an aerodynamicist at McLaren in the 1980s.
He also worked at Benetton - which became the Renault works team in the 2000s - and briefly became team principal at Enstone in the wake of the resignations of Flavio Briatore and Pat Symonds after the crash controversy that engulfed the squad as a result of the 2008 Singapore Grand Prix.