Buttimer regularly referees matches in the League of Ireland. In the past he has been dispatched to referee local derbies including the
Connacht Derby contested between Sligo Rovers and
Galway United in August 2007. He was also deployed in the 2013 FAI Cup Semi Final and Louth Derby between Dundalk and Drogheda. In September 2007, Buttimer took issue with the colour of the goalkeeper's jerseys in a game between
Dundalk and
Shelbourne. It was eventually agreed that the Dundalk goalkeeper would wear a t-shirt with a white strip of tape on the back whilst the Shelbourne goalkeeper would wear a training top for the match. A similar incident occurred in March 2008, when he said that the kit worn by Sligo Rovers was too similar to the kit worn by
St Patrick's Athletic. Buttimer took charge of the
2008-09 UEFA Cup qualifier first round second leg match between
KS Vllaznia Shkodër and
FC Koper at the
Loro-Boriçi Stadium in
Shkodër,
Albania. The match finished 0 – 0, with him issuing three yellow cards. On 23 November, Buttimer took charge of the 2008 FAI Cup Final, in which
Bohemians beat
Derry City This was the first FAI Cup Final to feature a penalty shoot-out. ==References==