Since coming on the scene in 2009, 24-year-old Madigan has played 73 times for Leinster and has scored over 230 points, winning two Heineken cup medals. With the ability to play at out-half and full back, he has played a pivotal role in Leinster's recent success.
At the handover, he said: "I am honoured to be invited to support Jack Doran Motors and I look forward to working with Jack and Mark throughout the season in my role as brand ambassador.
"I am delighted with the car; it really suits my personality and it stands out from the crowd. I particularly like the 18" alloys and the LED lights!"
Mark Doran added: "We are thrilled to have Ian on board as our Brand Ambassador for DS4. Ian is the perfect fit for Jack Doran Motors and Citroën; he is a committed, hardworking professional that always strives for perfection, traits that epitomise the ethos of Jack Doran Motors."