[6] From October 2001 until July 2004 Maixner served on the Victorian Surgical Consultative Council,[8] a special purpose council established in 2001 by the then-Minister of Health, John Thwaites, which reports to the Minister for Health and analyses, studies and reports on potentially preventable surgical deaths in Victoria, with the aim of improving the safety and quality of surgery in Victoria.
[9] In 2006, Maixner was credited with performing "ground-breaking" surgery when she operated on a three-year-old girl to successfully stop seizures caused by a rare genetic condition.
[11] Between 30 and 31 August 2009, Maixner presented at the XIV World Congress of Neurological Surgery in Boston, Massachusetts as a faculty member of the "Pediatric Neurosurgery: An Overview with Sub-specialty Applications" program and as a panelist on the "Chiari Type I Malformation in Children" discussion panel.
[12] On 16 and 17 November 2009, Maixner led a team of 16 neurosurgeons, plastic surgeons, and other specialist medical staff at the Royal Children's Hospital in the 32-hour "groundbreaking surgery" to successfully separate three-year-old Bangladeshi conjoined twins, Trishna and Krishna.
[19] On 26 November 2009, Maixner and other members of the medical and surgical team who cared for Trishna and Krishna were honoured with a civic reception hosted at Government House in Melbourne by Governor of Victoria, David de Kretser and Premier John Brumby.
[23] As of 2023, Maixner continued to practice neurosurgery, and has expressed that her greatest achievement at the Royal Children's Hospital is helping to grow a cohesive unit, based on respect, that nurtures people to become the best that they can be.