Jens Bauch (Simon Fraser) Number theory 31st Jan 2018 to 1st May 2018
Colva Roney-Dougal (St. Andrews) Geometric Topology 26th Feb 2018 to 30th Mar 2018
Christian Neurohr (Oldenburg) Number theory 18th Jun 2018 to 19th Sep 2018
Eamonn O'Brien (Auckland) Comp. group theory 25th Jun 2018 to 29th Jun 2018