Ritterman was educated at North Sydney Girls High School, the New South Wales State Conservatorium of Music (now Sydney Conservatorium of Music, part of the University of Sydney), the University of Durham, and King's College, London. She held academic positions in England from 1975 when she was Senior Lecturer in Music at the Middlesex Polytechnic (to 1979). Ritterman became the third Chancellor of Middlesex University on 3 July 2013.
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- "Ritterman, Dame Janet (Elizabeth)". Who's Who. ukwhoswho.com. Vol. 2015 (online ed.). A & C Black, an imprint of Bloomsbury Publishing plc. Retrieved 17 September 2015. (Subscription or UK public library membership required.)
- "Chancellor | Middlesex University London". www.mdx.ac.uk. Retrieved 3 January 2014.
- The International Who's Who. Europa, London & New York. 2004. p. 1417.