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.

RFP/RFQ No.RFQ No. 2019-0240/POGGIO
Date posted06 December 2019

Design and Construction of Transport Housing Unit for MSIR Pod

Request for Quotation

Closing date13 December 2019
RFP/RFQ No.RFQ No. 2019-0231/DABBS
Date posted03 December 2019

Ethics Training

Request for Quotation

Closing date09 December 2019
RFP/RFQ No.RFQ No. 2019-0214/POGGIO
Date posted21 October 2019

Calibration of Seismometers

Request for Quotation

Clarifications #1

Closing date04 November 2019
RFP/RFQ No.RFP No. 2019-0212/HASAN
Date posted18 October 2019

Sustainment of the Nearshore Underwater Cable at HA01, Cape Leeuwin, Australia

Request for Proposal

Clarification #1 - Updated Terms of Reference (ToR)

Clarification #2

Closing date16 December 2019

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. 

General Conditions of Contract (PDF)

General Conditions of Goods (PDF)

Please note that only requests from registered companies or organizations from CTBTO Member States (PDF) 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.