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. 2015-0035/KOFFI
Date posted05 March 2015

Supply of GPS Repeater for IMS Stations

Request for Quotation

Closing date18 March 2015
RFP/RFQ No.RFQ No. 2015-0028/MAHLEN
Date posted20 February 2015

Provision and Installation (including cabling) of Single Phase Digital Voltage Stabiliser for Spalax-DR System EUX11 in Safat, Kuwait

Request for Quotation

Closing date06 March 2015
RFP/RFQ No.RFP No. 2015-0022/ALVAREZ
Date posted13 February 2015

Maintenance and Enhancements of the Seismic, Hydroacoustic and Infrasound Automatic Analysis Software, on a call-off basis

Request for Proposal

Appendix 1

Appendix 2

Closing date12 March 2015

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.