The Instrument Science Board (ISB) is the first technical body of the complex ET project organisation to be ready to work. Its composition has been endorsed by the ET steering committee the 14th of December 2020. Its mandate, timeline and original composition is described by the document ET-0085A-20. Its first objective is to deliver the ET Technical Design Report (ET-TDR) of the
infrastructure and of the detectors starting from the ET Conceptual Design Report (ET-CDR).

Please learn more about the ISB and how to participate at the wiki page: 

A snapshot of the current organisation is shown in the following image:

ISB Organigram