Commonwealth Games Federation president Dame Louise Martin has stepped down from the Birmingham 2022 board amid concerns over a lack of diversity.
The Games' organising committee has been criticised for having an almost entirely white executive management team and board.
Barbados-based Sandra Osborne QC will take Martin's place on the board.
Osborne, president of the country's Olympic and Commonwealth Games associations, sits on the Commonwealth Games Federation (CGF) executive board as its legal adviser and chairs its governance and integrity committee.
A sports lawyer, she also chairs the International Tennis Federation's ethics commission.
"The CGF is proud that our organisation reflects the diversity of the Commonwealth Sport Movement and that we have a person of Sandra's calibre to actively contribute on the Birmingham 2022 Board," a CGF statement said.
"The CGF supports the renewed commitment of the Birmingham 2022 organising committee to ensure that its governance and management fully reflects the diversity of the city and region.
"Dame Louise will continue to play an active role in the supporting preparations for the staging of Birmingham 2022."
Dunfermline-born Martin was vice-chairwoman of the organising committee for the 2014 Glasgow Commonwealth Games.
There had not been any specific calls for her to step down from the 2022 board, but it is understood she had been considering doing so for several months as a means of helping to improve representation.
She is currently the only Birmingham 2022 director to have offered to resign, but her decision could put added pressure on others to follow suit.
John Crabtree, chair of the Birmingham 2022 board said: "We are extremely grateful for Dame Louise's time, effort, and her valuable contribution. We welcome Sandra to the board and look forward to benefiting from her unrivalled experience as her skill set and future input help us deliver an incredible Commonwealth Games.
"We collectively remain committed to ensure that Birmingham 2022 is truly a Games for everyone and something that the city and region can be proud of."