He competed at the 2008, 2012, 2016, 2020 and 2024 Summer Paralympics in [1] athletics in middle distance and marathon running events.

[8] At the 2008 Victorian Country Championships, Roeger set a Paralympic A qualifying time of 4:02.04 in the 1500 metres.

[6][9][11][14][15] His Paralympic training included five gym sessions a week with a focus on leg strength.

[17][18] In 2014, Roeger ran almost a five-second 1500 m personal best (3 minutes 51.08 seconds) on 20 March 2014 at the Victorian Milers Club.

[17][10] Also in 2014, he was part of the Australian Sports Commission team that represented Australia at the JP Morgan Chase Corporate Challenge in London, England.

[21] He qualified for the Australian Athletics Championships in Brisbane, Queensland Open 1500m and ran in the heats.

[22] In June 2015 in Boston, United States, Roeger ran 3:48.55 to break the Men's 1500 m T46 world record but it was not ratified as no drug test was available.

[3] On 4 February 2017 at the inaugural Sydney Invitational, Roeger smashed the T46 1500m world record of 3:50.15 by running 3:46.51.

[27] Roeger was selected to compete at the 2017 World Para Athletics Championships in London, England but withdrew just prior to the competition due to injury.

[4] After originally being disqualified, he was awarded the silver medal in the Men's 1500 m at the 2019 World Para Athletics Championships in Dubai.

[31][32] Roeger went into the event as favourite but a stress fracture in his leg in the month leading up to the Games led to a compromised, preparation and training load coming into Tokyo.

[34] Roeger was forced to switch back to the 1500m after the marathon was omitted from the 2024 Paris Paralympics program.

[36] In the lead up to the 2024 Tokyo Paralympics in Paris, Roeger won the bronze medal at in the Men's 1500m T46 at the 2024 World Para Athletics Championships in Kobe.