Dan Martin has extended his deal with Team Garmin-Sharp-Barracuda through to 2014.
The 26-year-old, nephew of the 1987 Tour de France champion Stephen Roche, has made great strides since turning professional, including victory in the 2010 Tour of Poland and a stage victory in last year's Vuelta a Espana.
He finished 35th in the overall classification on his Tour debut - one hour, 25 minutes and 23 seconds behind yellow jersey winner Bradley Wiggins - capturing three top-10 finishes along the way.
"Slipstream Sports has been my home for five seasons and I'm happy to say I will ride in Garmin-Sharp-Barracuda colours for two more years," he said.
"It's been an incredible few months for me with finishing my first Tour de France and competing in the Olympics, and re-signing with the team just adds to it."