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. 2020-0162/DABBS
Date posted24 November 2020

SolarWinds Maintenance Services Renewal for a period of 5 years

Request for Quotation

Clarification #1

Closing date01 December 2020
RFP/RFQ No.RFP No. 2020-0160/POGGIO
Date posted09 November 2020

Property Insurance for the CTBTO Technology Support and Training Centre (TeST Centre)

Request for Proposal

Closing date18 December 2020
RFP/RFQ No.RFQ No. 2020-0147/DABBS - RE-BID2
Date posted06 November 2020

RE-BID2 - Annual Maintenance for 25 Pieces of DANTHERM AC Field Units

Request for Quotation

Closing date03 December 2020
RFP/RFQ No.RFP No. 2020-0133/APYLOV
Date posted19 October 2020

Supply and Delivery of IMS Station Power Systems, Communications Systems, Equipment and Associated Services, on a Call-off Basis

Request for Proposal

Clarifications #1 (including extension to deadline)

Mandatory Outline & Requirements of Tech Proposal (in Word)

Clarifications #2 (including further extension to deadline)

Closing date07 December 2020
Date posted06 October 2020

RE-BID - Services to Document and Finalise the Development of the Preparedness and Deployment Concept for On-Site Inspection Equipment

Invitation to Bid

Closing date11 December 2020

Ethical Standards

The Commission requires its staff members, as international civil servants, to adhere to the highest standards of ethics and integrity in carrying out their duties.  The solicitation or acceptance of any gratuity, gift, favour, entertainment, loan or anything of value from suppliers who conduct business with the Commission is strictly prohibited.
Suppliers that wish to work with the Commission or already conduct business with the Commission are required to adhere to the UN Supplier Code of Conduct and any other ethical requirements as outlined in the Commission’s solicitation and/or contractual documents.

Additional information

If you are not yet registered with our organization, kindly fill in our Vendor Profile Form (PDF) 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.