He made his World Cup debut as an assistant referee in 2007 during the match between Ireland and Namibia. He also officiated (as touch judge or television match official) during three games in the 2009 Six Nations Championship. He refereed his first Six Nations match in 2010. Poite was appointed to the 10-man elite referees panel for the 2011 Rugby World Cup, where he refereed four matches. He was also appointed to referee the third and deciding Test of the 2013 British &amp; Irish Lions tour against Australia. He was later excluded for a few months from the IRB panel for giving an incorrect yellow card during the 2013 Rugby Championship. Poite famously told the England rugby team "I'm a referee, not a coach", during the 2017 Six Nations Championship match versus Italy. Poite was appointed referee for the third and deciding British &amp; Irish Lions tour of New Zealand (game ended in a 15–15 draw, leaving the three match series tied 1–1) - Poite made a crucial error, which prevented New Zealand a likely opportunity of winning the match and series.