A Wollondilly junior, Muhleisen was contracted to the
St. George Illawarra Dragons as a junior coming through the ranks through the academy system. In round 22 of the
2023 NRL season, Muhleisen made his first grade debut for the St. George Illawarra Dragons in his side's 24−18 loss to
Manly at
WIN Stadium. On 28 September 2025, Muhleisen played in St. George Illawarra's 30-12 NSW Cup Grand Final loss to
New Zealand. == References ==