This is the list of current procurement tender(s) open for proposals in the Preparatory Commission for the CTBTO. Please visit this site from time to time for information on new procurement tenders.

Date posted18 July 2016

Field Deployable in situ Decontamination Equipment

Request for Quotation

Closing date28 July 2016
RFP/RFQ No.RFP No. 2016-0139/RAHMAN
Date posted14 July 2016

Geotool Software Maintenance 2017

Request for Proposal

Closing date31 August 2016
Date posted14 July 2016

Numerical modeling study contributing to understanding the variations in the seismic wavefield due to the presence of changes in the geological environment caused by an underground nuclear explosion

Request for Proposal

Closing date05 September 2016
RFP/RFQ No.RFP No. 2016-0135/APYLOV
Date posted01 July 2016

Supply, consolidation, testing, delivery of equipment and provision of services for IS20 Galapagos Islands, Ecuador, and supply of equipment for the Commission's depot

Request for Proposal

Closing date02 August 2016

Additional information

If you are not yet registered with our organization, kindly fill in our Vendor Profile Form (Word Document) and return it either electronically to or via post to Chief, Procurement Section,  CTBTO, Vienna International Centre Wagramerstrasse 5, P.O. Box 1200, A-1400 Vienna, Austria.  Further information for potential vendors can be found in Annex I, Annex II, Annex III and in our General Conditions of Contract (Word Document). Please note that only requests from registered companies or organizations from CTBTO Member States (Word Document) will be considered.

In addition, if you wish to be included in the CTBTO mailing list, please contact the Procurement Section of CTBTO at You will then be informed of new tenders via Email as soon as they are issued.

Use of former Preparatory Commission for the CTBTO (“Commission”) employees in the preparation of Proposals:

A Bidder must not, in the absence of prior written approval from the Commission, permit a person to contribute to, or participate in, any process relating to the preparation of a Proposal or the procurement process, if the person:

a. at any time during the 12 months immediately preceding the date of issue of the Solicitation was an official, agent, servant or employee of, or otherwise engaged by the Commission;

b. at any time during the 24 months immediately preceding the date of issue of the Solicitation was an employee of the Commission personally engaged, directly or indirectly, in the definition of the requirements, project or activity to which the Solicitation relates.