The club won the World Universities Debating Championship in 1981 and 2006.

JCI World Debating Championship is a tournament with teams of three members.

It is a relatively new tournament and debates are run in British Parliamentary style (as is done at the World Universities Debating Championship).

OUDS has sent teams to the World Universities Debating Championship.

Cruz was also a semi-finalist at the 1995 World Universities Debating Championship.

In 1987 & 2006, UCD hosted the World Universities Debating Championship.

It hosted the first World Universities Debating Championship in its current form in 1981 and again in 1990 and 2001.

This year's team for the 2013 World Schools Debating Championship in Antalya, Turkey is composed by:

The team for the 2011 World Schools Debating Championship in Dundee, Scotland is:

In 1988, she presided over the World Universities Debating Championship, held in Sydney.