Claire Williams is to take on the newly-created role of deputy team principal of the Grove-based marque with immediate effect.
Williams will work alongside her father, founder and team principal Sir Frank as they create a clear succession path in light of former executive director Toto Wolff's departure in January to Mercedes.
The team had planned on announcing the appointment just before the start of the current season, but decided on a delay in light of the recent death of Lady Virginia Williams, Claire's mother.
After starting out as the team's press officer in 2002, Williams has enjoyed a succession of promotions in recent years, initially taking on the role of head of communications, and then director of marketing and communications.
As well as becoming deputy team principal, Williams will also retain her current position as commercial director, and will continue to be part of the company's board.
Sir Frank Williams said: "Over the past decade Claire has worked tirelessly for Williams.
"Her knowledge of the sport and passion for the team is unquestionable, and I'm proud to say during her time here she has proven herself to be one of our most valuable assets.
"With Claire being appointed deputy team principal, I know the future of Williams is in extremely safe hands.
"This appointment also had Ginny's blessing, who I know would have been incredibly proud to have seen Claire taking on this position by my side."
With regard to her new role, Claire Williams said: "I have grown up in the sport and learnt the ropes from one of Formula One's legendary team principals and as a result I feel well equipped for this new challenge.
"I understand the commitment that every person within the team gives each day to see our car out on the track, and I am determined to see us back at the top.
"It has been a sad month for my family and Williams as a company following the death of my mother, but as the season takes hold we must look to the future.
"It will be a privilege to play a part in taking the team into what I hope will be a successful next chapter."