The 24-year-old was part of North Carolina Courage's NWSL Championship side this season and was also named club MVP.

O'Sullivan has made over 60 appearances for her country despite being only 24 years of age and arrived in Canberra this week ahead of the new season.

“It is great to have Denise in town ahead of the season and she is already making an impact in training,” Canberra coach Heather Garriock said.

“For a 24-year old her list of accolades is brilliant, and to be voted the MVP of a title winning team in the NWSL tells you all you need to know.

“To have a player of Denise’s calibre at Canberra United is so important," she said.

It is the first time O'Sullivan has headed to the W-League and is set to begin training in the Captial this week.

“I have heard great things about the club from players who have been here in the past and I am looking forward to the experience,” she said.

“Speaking to Heather before my arrival I got a really good feel for the club and am confident it will be a good fit for me, and I’ve heard plenty of good things about Canberra as a place to live too,” O'Sullivan said.