Dunkley-Smith made his national representative debut in 2009 when he was selected to stroke an Australian U23 eight to contest the
World Rowing U23 Championships in Racice. In 2010, Dunkley-Smith competed in an Australian
coxless four, winning gold at the World Rowing Cup II in Munich and in the men's eight who took silver at the World Rowing Cup III in Lucerne. He then competed in an U23 coxless four at the 2010
World Rowing U23 Championships in Brest before three months later winning his first senior World Championship medal at
Lake Karapiro 2010—a bronze in the men's eight. In 2011, Dunkley-Smith secured a seat in the Australian senior coxless four, and for the next five years he rowed in that boat consistently at Olympics and at World Championships. At the
2012 London Olympics, Dunkley-Smith won a
silver medal in the Australian coxless four with Drew Ginn,
James Chapman and
Will Lockwood. Ginn's presence in the crew gave it a lineage to the successful Australian men's four crews of the 1990s that were known as the
Oarsome Foursomes. In 2013, Dunkley-Smith,
Alexander Lloyd,
Spencer Turrin and Will Lockwood won the silver in the four at the
2013 World Championships in Chungju after having won or placed at three World Rowing Cups that year. With Lockwood changed out for Fergus Pragnell, Dunkley-Smith, Lloyd and Turrin won a bronze medal at the
2014 World Championships in Amsterdam. As in 2013 they had performed strongly in the lead-up winning or placing at three World Rowing Cups. Dunkley-Smith was originally selected for the Australian men's eight in 2015, but an injury to
Alex Lloyd led to him being put into the two seat of the four. In 2016, along with Will Lockwood,
Joshua Booth, and Alex Hill, Dunkley-Smith was selected in the Australian Men's
Coxless four to compete at
Rio 2016. They placed second and third at two lead-up World Rowing Cups in Europe and in Rio de Janeiro at the
2016 Summer Olympics; they won their heat and semi-final and took the silver medal behind the fancied Great Britain crew in the final. It was Dunkley-Smith's last international appearance for Australia and a fitting end to a stellar representative career. ==Rowing Results==