Career
He played as a lock. He first played for New South Wales Waratahs, from 1988/89 to 1996/97. Then, he would play two seasons at West Hartpool, in England, from 1997/98 to 1998/99, one season at California Brive, in 1999/2000. Moving once more to England, he played for Sale Sharks (2000/01-2001/02), Rotherham Titans (2002/03) and Coventry R.F.C. (2003/04-2004/05), where he also played Rugby League with the Coventry Bears, and where he would finish his player career.
He first played for Australia U-21, but having dual citizenship, Australian and Italian, he would be called by coach Bertrand Fourcade for Italy, in 1992, while still playing in his home country.
He was called for the 1995 Rugby World Cup, playing two games, and for the 1999 Rugby World Cup, playing three games. Giacheri played twice at the Six Nations Championship, in 2002 and 2003.
His last game was at the 61-6 loss to Ireland, at 30 August 2003, in Limerick, in a friendly, aged 34 years old. Giacheri returned to Australia, after finishing his player career, becoming a coach.
He is the head coach of Randwick DRUFC, since 2010/11 and finished coaching the side in 2013.
In 2014, Giacheri became the head coach of American side San Francisco Golden Gate Reconstruction Finance Corporation, a team that pronominally competes in the Pacific Rugby Premiership.