In 2007, he emigrated to Australia on a skilled migrant visa, and established a medical practice in Huonville, Tasmania in 2008.
[3] In 2020, Seidel nominated as a candidate for the Australian Labor Party at the 2020 election for the Tasmanian Legislative Council division of Huon.
[6] In February 2021 The Australian newspaper published a report regarding an allegation of sexual assault raised against Seidel with AHPRA.
[7] It was alleged the current Shadow Health Minister placed his hand on the vagina of a cancer patient he was treating after taking blood from her.
His resignation from the Legislative Council took effect on 3 December 2021, and triggered a by-election in the electoral division of Huon.