The institution received a royal charter on 15 October 1877, this being a significant milestone in obtaining international recognition and standing.

In the early years of the Irish Free State Cumann na nInnealtóirí (The Engineers Association) was set up independently, in 1928, by incorporation under the Companies Act, 1908 to "improve and advance the status and remuneration of qualified members of the engineering profession"[1] as it was felt that the ICEI's charter prevented its negotiation of employment conditions and salary.

"The institution promotes the art and science of engineering...", in particular: Other Membership Titles The institution is divided into three sectors; Divisions, Regions, and Societies, which are further subdivided – their purpose is to promote engineering and share knowledge.

In accordance with EU requirements it is the designated authority for the engineering profession in Ireland.

The institution is also a signatory to a number of multilateral agreements, these are principally for registered professional titles and accredited engineering programmes, for academic programmes these are:[5] The institution is also the signatory to a number of bilateral agreements with engineering societies in the United Kingdom.