The Ireland centre had been sidelined since injuring his finger last month.
Robbie Henshaw is back for Leinster's Investec Champions Cup clash with La Rochelle on Saturday.
The Ireland centre had been sidelined since injuring his finger in the URC champions' win at Munster last month.
Garry Ringrose and RG Snyman are also back training with the province, while a decision will be made on Harry Byrne and Rabah Slimani's availability later in the week.

John Hodnett and Alex Kendellen Ruled Out Of Munster's Game Against Toulon On Sunday
Liam Rosenior Named New Manager Of Chelsea
Liam Rosenior Set To Become New Manager Of Chelsea
Tuesday Morning Sports Update
Celtic Have Sacked Manager Wilfried Nancy
Adam Idah Faces Race To Be Fit For The ROI's World Cup Play-Off Against Czechia
Ruben Amorim Sacked As Manchester United Head Coach
Monday Morning Sports Update