Mark Gillan, one of the architects of Williams’s 2012 revival, has left the team.
Gillan had joined Williams during its troubled 2011 Formula 1 campaign and was appointed as its chief operations engineer during its technical reshuffle.
The team confirmed to AUTOSPORT that Gillan had vacated his role to “spend more time with his family”.
Williams declined to comment on any plans to replace Gillan.
The squad endured its worst F1 season since the 1970s in 2011, finishing a distant ninth in the constructors’ championship.
But this year Williams recovered its form and while its position in the standings only improved by one place, it was a regular frontrunner again and won the Spanish Grand Prix.
Prior to joining Williams, Gillan had held positions at McLaren, Jaguar/Red Bull and Toyota, where he was head of aerodynamics in the team’s final F1 seasons.