Crossin was born in
Melbourne and was educated at
Deakin University, where she graduated in education. She worked as a teacher, and was an industrial officer of the
National Tertiary Education Union between 1996 and 1998. In 1998, she was appointed by the
Northern Territory Legislative Assembly to fill the
casual Senate vacancy created by the resignation of
Bob Collins. Crossin was Deputy Opposition Whip in the Senate from 2001 to 2004. On 20 October 2015, she became a director of the
Indigenous Land and Sea Corporation. She was married to Mark Crossin, and had four children. Crossin was made a
Member of the Order of Australia in the
2023 King's Birthday Honours, for "significant service to the Parliament of Australia, and to the community of the Northern Territory". Crossin died on 13 April 2026, following a heart attack on a flight to Australia from the United States, where she had been celebrating her 70th birthday. ==References==