Oatley was selected to represent Australia at the 2012 Summer Olympics in equestrian dressage. She will ride her horse, Clive. The Games were her third. Her 2012 selection was subject to scrutiny following allegations by Hayley Beresford, Australia's top ranked female dressage competitor, that there was bias by Equestrian Australia in the team selection process which Beresford charactertised as "blatant bias and double standards." Oatley was not a member of Australia's Shadow Olympic Squad until April 2012, after the initial team was named. During Olympic qualification, she "was granted an exemption from competing in one of the two compulsory nomination events after her horse fell ill." A similar exemption was not granted to another Olympic hopeful. She placed 9th with the Australian team in the team competition and 43rd in the individual competition.