- Eamonn O'Brien (Auckland)
- Comp. group theory
- 2nd Mar 1992 to 13th Mar 1992
- 22nd Jul 1996 to 26th Jul 1996
- 22nd Feb 1997 to 4th Mar 1997
- 22nd Mar 1998 to 4th Mar 1998
- 21st Jun 1998 to 26th Jun 1998
- 13th Dec 1998 to 20th Dec 1998
- 1st Nov 2000 to 30th Nov 2000
- 24th Feb 2002 to 2nd Mar 2002
- 21st Jan 2003 to 15th Feb 2003
- 18th Jan 2004 to 24th Jan 2004
- 31st Oct 2010 to 13th Nov 2010
- 29th Oct 2012 to 2nd Nov 2012
- 29th Apr 2013 to 30th Apr 2013
- 9th Nov 2015 to 11th Nov 2015
- 4th Dec 2017 to 8th Dec 2017
- 25th Jun 2018 to 29th Jun 2018
- 22nd Jul 2019 to 26th Jul 2019
- 25th Nov 2019 to 26th Nov 2019
- 16th Dec 2022 to 23rd Dec 2022
