The Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) was set up in 1996 with its headquarters in Vienna, Austria. It is an interim organization tasked with building up the verification regime of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) in preparation for the Treaty's entry into force as well as promoting the Treaty's universality.

For more information on the CTBTO, please visit: https://www.ctbto.org/

About Lassina Zerbo
Zerbo is the Executive Secretary of the CTBTO, a position which he assumed on 1 August 2013. He previously served as Director of the organization’s International Data Centre (IDC). He is a national of Burkina Faso. Zerbo has been instrumental in cementing the CTBTO’s position as the world’s centre of excellence for nuclear test-ban verification, as well as in driving forward efforts towards the entry into force and universalization of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). In November 2016, the Member States of the highest decision-making body of the CTBTO Preparatory Commission re-appointed Executive Secretary Lassina Zerbo to a further four year term of office until 31 July 2021.

For more information on the Executive Secretary, please visit: https://www.ctbto.org/the-organization/the-provisional-technical-secretariat-pts/organizational-structure-of-the-pts/curriculum-vitaelassina-zerboexecutive-secretary/