Any Civil or Environmental Engineering student can be a member of IACES. Persons supporting IACES can also become members.

The Local Committee (LC)is an official section representing IACES with at least three active members at a University. Local Committees organize activities such as Exchanges and Courses, and attract fellow students at their Universities to become active members by promoting local and international activities.

The Contact Person (CP) is the official contact of IACES at Universities where no Local Committee exists.

The General Assembly of Representatives (GAR) is the parliament of IACES and makes decisions on general affairs. It assembles at least once a year.

The Coordination Centre (CC) is the secretariat of the Association. One of its main tasks is to publish the IACES Newsletter. The CC is hosted for a one-year period by one Local Committee.

The General Board (GB) represents IACES on an international level. The GB has five members from four different Countries; the Secretary and the Treasurer of the CC are automatically members, the President and two Vice Presidents are elected by the GAR.

The Alumni Club (AC) was founded in 1993. It gives the graduated former IACES member but also every other graduated Civil or Environmental Engineering student good opportunities to stay in contact with collueges. Its members support IACES work and are informed about current IACES activities.