Professional Services for Subsurface Investigation at Vulcan Substation
Eskom
This tender closed on 9 October 2026
Bidding is no longer open. Browse open construction & engineering tenders or see the related tenders below.
In plain English
Eskom is procuring professional services to investigate potential subsurface instability near the NTCSA Vulcan Substation. The tender requires a documented Quality Management System compliant with ISO 9001.
Always check the official documentDescription
The National Transmission Company South Africa (NTCSA) invites professional services to investigate potential subsurface instability and sinkhole risks at the Vulcan Substation in Witbank. The project involves geotechnical investigations, methane gas studies, and the development of rehabilitation strategies for the substation and associated transmission infrastructure. Key deliverables include a design proposal, method statement, Bill of Quantities, and a comprehensive technical report with geophysical models. The project is classified as high-risk and requires adherence to NEC3 Professional Services Contract standards. The tender is issued by NTCSA, with a closing date of 09 October 2026 at 10:00am. Bidders must achieve a minimum technical threshold of 70% to qualify for further evaluation.
What you need to qualify
- CSD registration — Registration on the Central Supplier Database — required to do business with government.
- Letter of Good Standing — COID registration and a Letter of Good Standing from the Compensation Fund.
- Other registration — An industry registration the tender requires (e.g. PSIRA, NHBRC, a professional or trade licence).
Full requirements
- Valid CSD registration
- Lead engineers and geologists must be registered with ECSA or SACNASP
- Valid COIDA Letter of Good Standing
- ISO 9001 compliant Quality Management System
- Proof of completion for 3-4 similar geotechnical projects with reference letters
- Audited financial statements for the previous 18 months
Contact & how to apply
Name: Tshifhiwa Modau
Email: ModauT@eskom.co.za
Phone: 011-629-5553
How to apply: Tenders must be submitted electronically via the NTCSA E-tendering portal at https://tenderbulletin.ntcsa.co.za. Documents must be uploaded into the designated Technical, Commercial, and Financial folders in PDF format, with price lists also provided in Excel. The total submission size must not exceed 4GB.
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