Peter David Rathjen (born 12 February 1964 in Cambridge, England) is an Australian scientist and medical researcher internationally recognised in stem cell science. In May 2017 it was announced that he will take up the position of Vice-Chancellor at the University of Adelaide as of January 8th, 2018. During his period at the University of Tasmania, he has led a range of projects to position the University as a driver of socio-economic prosperity in Tasmania, including the creation of University precincts and facilities within the CBDs of Hobart, Launceston and Burnie.
His research specialty is embryonic development and particularly the development of stem cell therapies for replacement heart muscle, blood and nerve cells.
Born in the United Kingdom, his father Anthony John Rathjen had previously won a PhD scholarship to Cambridge University. They moved to South Australia in 1965 when he was a child and he was educated at Blackwood High School in Adelaide. He studied Science at the University of Adelaide, majoring in biochemistry and genetics, and completing an honours degree. While at Adelaide, he was awarded the R A Fisher Prize for Genetics and the Morton Prize for Biochemistry, both in 1983. He also reached international standard at orienteering and was the reserve for the Australian team at the 1985 World Orienteering Championships.