The IRFU Committee member and Roscommon native has been a member of the World Rugby Council since 2018.
She becomes the first woman elected to sit on World Rugby EXCO, alongside Ada Milby (Philippine Rugby President) who was also elected this week.
Commenting following the announcement, Carty said: “I’m really pleased and excited to be elected to this role. It’s a true honour, but moreover, it’s a great opportunity.
“There are a number of key pillars that are of critical importance to all our stakeholders at World Rugby, Six Nations, union, and community levels.
“We’re coming into a key window in the Rugby World Cup cycle. We need to maximise opportunities for competition and growth while honouring the values at the heart of our game.
“Player welfare must remain an absolute priority. As is sharing the message of how rewarding it is to be part of this great game.
“My journey started in developing women’s rugby. We’ve reached the point where the women’s game is ingrained in our plans to grow the game globally. It is imperative that we achieve this at all levels across the game.”