The 22-year-old former Sporting Fingal midfielder has joined the Glovers on a contract until the end of the season
The 22-year-old former Republic of Ireland youth international joins the League One outfit on a contract until the end of the season.
Speaking to the club's official website, Dubliner Dawson said that he was 'over the moon' to have joined the League One outfit.
"I am over the moon to sign for Yeovil Town," he said. "I am friendly with Paddy Madden, who has only good things to say about the club. I am really looking forward to playing in green and white."
Dawson began his senior career with Sporting Fingal before joining Shelbourne in 2011, where he spent two seasons.