Dan Sheehan signed his first professional contract with Leinster in June 2020, and made his debut for Leinster in October 2020 in the Pro14 against Zebre, scoring two tries in the match.

Sheehan was honoured as Leinster's Men's Young Player of the Year for the 2021-22 season, and was also named in the URC Elite XV of the year for the 2022-23 season.

On the international stage, Sheehan made his senior debut in November2021, against Japan at the Aviva Stadium. Dan earned his first start for Ireland in the February 2022 Six Nations match against Italy.

Dan had been Living in Bucharest for 3 years with his parents when their work took them to Poland, which saw him sent to boarding school with his brother. Bobby.

He hails from in Dublin and studied in Trinity College after leaving Clongowes in 2017