Fellows, generally directors or former directors of major production engineering laboratories;
Associate Members, research workers with recognized credentials who have the potential to become active CIRP contributors and collaborators;
Honorary Fellows, former Fellows who have gained outstanding merit by their activity and devotion to CIRP;
Fellows (Emeritus), active Fellows about to retire nominated for life at their request;
Corporate Members, companies or industrial research institutions that support the aims of CIRP and maintain an interest in the organization's activities also giving scientific and technical contributions.
In addition, CIRP offers a program for young distinguished researchers:
A program to temporarily affiliate young researchers (RAs) who contribute to CIRP activities and have the potential to further contribute to CIRP, e.g. by becoming Associate Members in the future. In case RAs change to industry, they might wish to bring their company to CIRP as Corporate member.