He was part of Under-20 squad for the IRB Junior World Championship in both the 2011 and 2012 tournaments.
Shipperley was a member of the Australia under 20 team that competed in the 2011 IRB Junior World Championship.
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In 2010, Garner was part of the IRB referee panel for the 2011 IRB Junior World Championship in Italy - refereeing 4 fixtures, before refereeing the final of the 2012 IRB Junior World Championship between hosts South Africa and New Zealand.
Gill was a member of the Australia U20s team that competed in the 2011 IRB Junior World Championship, along with fellow Queenslanders: Joel Faulkner, Tevita Kuridrani, Matt Lucas, Simon Morahan, Eddie Quirk, Siliva Siliva, Dom Shipperley, and Kimami Sitauti.