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. 2018-0024/HASAN
Date posted16 April 2018

Overhauling and Updating of Interactive Online e-learning Modules

Request for Quotation (RFQ)

Closing date26 April 2018
RFP/RFQ No.RFP No. 2018-0052/JIBRIL
Date posted13 April 2018

Provision of Linux Support Services

Initiates file downloadRequest for Proposal

Closing date11 May 2018
Date posted29 March 2018

Base of Operations (BOO) Infrastructure, Furniture and Specialized Accessories

Request for Proposal

Clarifications #1

Clarifications #2

Clarifications #3

Closing date26 April 2018
Date posted21 March 2018

Field Air Conditioners, Diesel Electric Heaters and Accessories, on a Call-off Basis

Request for Proposal

Closing date20 April 2018

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 (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.