Former Mercedes man Paddy Lowe will join Williams as early as next month, after his current spate of 'gardening leave' concludes.
Lowe played a key role in Mercedes' run of championship doubles as the Brackley squad dominated the sport under his tenure as technical director.
However, the Brit left the team three weeks ago and was placed on 'gardening leave'.
According to reports, Mercedes have agreed terms with Williams that will see them reduce Lowe's time away from Formula 1 allowing him to join Williams as early as March 1st.
The 54-year-old will become a senior technical director at the Grove squad, as well as a board director alongside deputy team principal Claire Williams.
For Lowe this is a return to the past as he began his career at Williams in 1987.
Meanwhile former Ferrari man James Allison is expected to be announced as Lowe's replacement at Mercedes.
Experience the full coverage of the FIA Formula One season throughout 2017 on FOX Sports Play, where you can watch LIVE races from angles unlike any other, highlights, interviews, behind the scenes and many more. Don’t miss it!