This is the governing document that defines objectives and the scope within which the charity must operate.

Adds details to the principles set out in the Memorandum of Articles, for example post-nominal abbreviations for the different classes of membership or when Honorary roles are to be re-appointed.

Code of conduct

Lays down the rules of professional conduct that all professional members need to abide by.

A form for raising a complaint against a member under the Code of Conduct, Memorandum of Articles or Byelaws.


This document governs the treatment of data by staff, volunteers, Council and Members.

This document outlines our commitment to eliminating discrimination and encouraging diversity amongst our workforce.

The IES is a signatory to the Science Council's Declaration on Diversity, Equality and Inclusion.

An environmental audit of the IES office, using the science-based sustainability framework developed by The Natural Step.

Member activities


Swaziland has proposed legalising the trade in rhino horn in order to pay for anti-poaching measures. Is this a good idea?

Upgrade your membership

For those wishing to re-grade their membership or to rejoin after a career break.

For members wishing to apply for Fellowship.