Rolland, who refereed the 2007 Rugby World Cup final in Paris, was also in quarter-final action on April 5 when London Irish beat Perpignan at the Madejski Stadium.
A member of the Leinster Branch of Referees, he took charge of the Leicester Tigers v Llanelli Scarlets Heineken Cup semi-final twelve months ago.
Meanwhile, Welshman Nigel Owens will be the man in the middle for Munster's Heineken Cup semi-final clash with Saracens at the Ricoh Arena on Sunday, April 27 (kick-off 3pm).
It will be Owens' first time to referee a Heineken Cup semi-final. He was also in charge for Munster's quarter-final win over Gloucester at Kingsholm on April 5.
2007/08 HEINEKEN CUP SEMI-FINALS:
Saturday, April 26 -
LONDON IRISH v TOULOUSE, Twickenham, 3pm; Referee: Alain Rolland (Ireland); TV Coverage: Sky Sports/FR2/Sky Italia
Sunday, April 27 -
SARACENS v MUNSTER, Ricoh Arena, 3pm; Referee: Nigel Owens (Wales); TV Coverage: Sky Sports/Canal+ Sport/Sky Italia/RTE (highlights)
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