The IISS is both a registered UK charity and a private company limited by guarantee. The Institute is governed by a Memorandum and Articles of Association lodged with the Registrar of Companies and the Charity Commissioners for England and Wales. The Institute’s Articles of Association reflect current best practices and the requirements of the Companies Act 2006 and recognise the fiduciary responsibilities carried by the Institute’s Trustees.

The IISS Trustees constitute Directors for the purposes of the Companies Act, and act as Trustees for the purposes of the Charities Act.  The Board of Trustees is served by the Audit, Investment and Remuneration sub-committees.

The Trustees appoint members of the IISS Council, the Institute’s intellectual advisory body.

Honorary Positions

The Trustees determine the appointment, terms of office, rights and obligations of any other person appointed to an Honorary Position. The titles of President Emeritus and Vice-President of the Institute are restricted to the present incumbents who are:


- Professor Sir Michael Howard


- Ambassador Yoshio Okawara

Individuals holding Honorary Positions may be invited to attend, but do not hold voting privileges, at meetings of the Trustees.