sentences:  Rathjen returned to the University of Adelaide, where he worked as Lecturer in Biochemistry from 1990 to 1995 and Professor in Biochemistry from 1995 to 2006.He was appointed to the Chair of Biochemistry in 1995.He became Head of the Department of Molecular Biosciences in 2000, and became Foundation Executive Dean of the Faculty of Sciences in 2002, a role he kept until 2005.