Olivier Castellani is a French engineer from SNCF who worked for 11 years as a RAMS expert in the Rolling Stock Engineering Center. Since 2015, he is a project manager for the homologation of trains in foreign countries.

Both Marc and Olivier took part in the issuing of the common safety method (EU Regulations 402/2013 and 2015/1136) and to the update of the CENELEC standard on RAMS: EN 50126.