EIROforum maintains a series of Thematic Working Groups as well as certain ad-hoc groups. Within their mandate, the Thematic Working Groups propose and implements activities of interest to the EIROforum partners, often in cooperation with external partners.

The EIROforum Working Groups are:

EIROforum Working Group International Affairs
EIROforum Working Group Instrumentation
EIROforum Working Group Information Technology
EIROforum Working Group Technology Transfer