--- title: "FW Services - Specialist Engineering Services 1030" ocid: "ocds-h6vhtk-055cfb" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-055cfb" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-055cfb.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-055cfb.json" source: "Find A Tender Service" current_stage: "Tender" buyer: "SCOTTISH HYDRO ELECTRIC TRANSMISSION PLC" published: "2025-09-22" --- # FW Services - Specialist Engineering Services 1030 Buyer: SCOTTISH HYDRO ELECTRIC TRANSMISSION PLC Current stage: Tender OCID: ocds-h6vhtk-055cfb [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-055cfb) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-055cfb.json) ## Summary Scottish Hydro Electric Transmission PLC is currently in the tender stage for the "FW Services - Specialist Engineering Services 1030" contract, focusing on specialist engineering services crucial for enhancing renewable energy infrastructure in Scotland. The procurement process utilises a competitive flexible procedure, with a selective method for awarding contracts based on a two-step procedure involving Pre-Qualification Questionnaires (PQQ) and Invitation to Tenders (ITT). The main procurement category falls under services, with a significant total contract value estimated at GBP 66 million. The deadline for expressing interest is 2nd October 2025, with the award announcement expected on 24th November 2025. The services are categorised into four lots: HVDC & FACTS, Cable Systems, AC Networks, and Offshore and Subsea Services, each vital for the project execution across various locations in the United Kingdom. This tender represents a significant opportunity for businesses specialising in engineering services to grow by supplying expertise in HVDC, FACTS, AC networks, and offshore installations. It opens the door for businesses with competence in system design, civil, and offshore works, to secure a position in a high-value framework, which could extend until 2030, considering possible renewals. SMEs are encouraged to participate, as the procurement setup ensures opportunities for diverse suppliers, particularly those capable of offering comprehensive technical and engineering support across multiple project stages, from concept through to commissioning and maintenance. ## Notice SSEN Transmission is the licence holder for the transmission system in the north of Scotland. To meet the government's target for renewable generation, and for the development of the existing infrastructure, significant work is being undertaken on the transmission system. This work includes the building and rebuilding of overhead lines, the development of grid substations, the construction of HVDC converter and cable systems, and the construction of FACTS devices. The projects and work being undertaken are in line with the NESO (National Electric System Operator) published Holistic Network Design (HND, Pathway to 2030 and Beyond 2030) reports. SSEN Transmission is responsible for delivering the complex technology and network solutions relating to any Scottish Island or network solutions with offshore assets. Particularly, any electricity system transmission infrastructure, either offshore or onshore, including HVDC, FACTs, AC networks, cable systems, and offshore installations The purpose of establishing this Services Framework is to ensure SSEN Transmission has access to a range of specialist engineering services. The Services will include but not be limited to engineering competencies related to engineering management, engineering drawings, plant/equipment/system specification, electrical design, civil design, offshore installation design, offshore works, construction-site support, installation support, commissioning support, consent related works, engineering compliance, risk management, risk analysis, and design assurance. The Consultant will be able to provide support during all project stages including concept, option selection, FEED, detailed design, manufacturing, testing, construction, installation, and commissioning stages. The Services will be Lotted. Lot 1: HVDC & FACTS: Expertise in all aspects of HVDC and FACTS devices. Lot 2 :Cable Systems: Expertise in HV Cable Systems, covering both AC and DC technology for land and submarine applications. Lot 3; AC Networks: Expertise in all aspects of AC Networks. Lot 4: Offshore and Subsea Services: Expertise in preparing requirements and specification documents to provide technical direction and governance for the design, delivery, operation, maintenance, and decommissioning of offshore substation installations. ### Lot Information HVDC & FACTS Expertise for all aspects of HVDC & FACTS devices including but not limited to: (1) System design, (2) Network & system studies, (3) Earthing system design, (4) Station / Equipment layout design, (5) Plant & Equipment design / testing, (6) DC Control & Protection design and settings development, (7) DC Control & Protection system testing using PSCAD and RSCAD/RTDS, (8) AC & DC Control & Protection interfacing and integration, (9) AC Protection & Control scheme designAC Protection & Control setting calculation including short-circuit modelling and calculations, (11) Operator interfaces & SCADA systems, (12) Auxiliary power systems, (13) Secondary mechanical & electrical systems, (14) Commissioning and commissioning management, and (15) Operations & maintenance. Renewal: 2 x 12 months extensions Cable Systems Expertise for HV Cable Systems: This scope pertains to AC and DC technology, for land and submarine applications. (1) Cable system design (i.e., thermal rating calculations using both analytical and finite element methods, induced voltages / currents, electro-magnetic fields, etc), (2) Cable routing design and risk assessment, (3) Installation design (i.e., pulling tensions, thermo-mechanical & marine engineering calculations), (4) Mechanical protection design, (5) Monitoring & communication fibre optic cable system design, (6) Testing and test witnessing (factory and site), (7) Site and vessel representation for installation activities, (8) Factory audit (quality & technical), (9) Failure investigation and root cause analysis (RCA), (10) Reliability, availability & maintainability analysis, (11) Operations & maintenance strategy and planning, (12) Technical training to Employer's personnel, (13) Diagnosis, analysis, and interpretation of cable system health & integrity based on monitoring data acquired from field. Renewal: 2 x 12 months extensions AC Networks Expertise for all aspects of AC Networks including but not limited to: (1) Station design, (2) Earthing system design, (3) Plant & Equipment design / testingProtection & Control scheme design, (5) Protection & Control setting calculation including short-circuit modelling and calculations, (6) Protection & Control system testing, (7) Operator interfaces & SCADA systems, (8) Overhead line design, consenting, and installation, (9) Auxiliary power systems, (10) Secondary mechanical & electrical systems, (11) Commissioning and commissioning management, and (12) Operations & maintenance Renewal: 2 x 12 months extensions Offshore and Subsea Services Expertise for all aspects of preparation of requirements & specification documents to provide technical direction and governance for design, delivery, operation, maintenance, and decommissioning of offshore substation installations including but not limited to: (1) Site selection and desktop studies for option selection stage, (2) Cable routing design and selection including burial risk assessment (CBRA), (3) Unexploded ordinance (UXO) survey and risk assessment, (4) Cable protection system (CPS) design and analysis, (5) On-bottom stability and free span analysis for subsea cable installation, (6) Burial assessment study (BAS) for subsea cable installation, (7) Design, feasibility and risk assessment for horizontal directional drilling (HDD), (8) Corrosion analysis for subsea cable installation, (9) Loadout, spooling, unspooling of subsea cable systems, (10) Jacket primary & topside secondary structural design, (11) Pile foundation and grouted connection for jacket sleeved piles, (12) Geotechnical ground modelling and interpretation (structures, piles, and subsea cable installation) (13) Metocean interpretation for structural design jacket & topside, (14) Fabrication, transportation, and installation studies (HLV & float over options), (15) Material, fabrication, corrosion, & protection design for topside and substructure, (16) LV electrical design for ducting, cable routing and cable cabinets, interfacing with topside structural design (17)Lifecycle and condition monitoring for jacket primary and secondary topside structures, (18) Operations and maintenance requirements for complete offshore substation asset, (19) Design risk management, from concept design through to decommissioning, (20) Decommissioning, and (21) Design verification and certification support Renewal: 2 x 12 months extensions ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/058412-2025 | | Notice type | UK4 - Tender Notice | | Procurement type | Framework | | Procurement category | Services | | Procurement method | Selective | | Procurement method details | Competitive flexible procedure | | Tender suitability | SME | | Awardee scale | Not specified | | All stages | Planning, Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 22 Sep 2025 | | Submission deadline | 25 Sep 2025 | | Future notice date | 30 Sep 2025 | | Award date | Not specified | | Contract period | 10 Dec 2025 - 9 Dec 2028 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £55,000,000 | | Lots value | £55,000,000 | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Active | | Lots status | Active | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | SCOTTISH HYDRO ELECTRIC TRANSMISSION PLC | | Locality | PERTH | | Post town | Perth | | Postcode | PH1 3AQ | | Country | Scotland | | ITL 1 | TLM Scotland | | ITL 2 | TLM0 Eastern Scotland | | ITL 3 | TLM02 Perth and Kinross, and Stirling | | Local authority | Perth and Kinross | | Electoral ward | Perth City North | | Westminster constituency | Perth and Kinross-shire | | Delivery location | Not specified | ## CPV Codes ### Divisions - 71 - Architectural, construction, engineering and inspection services ### Codes - 71300000 - Engineering services - 71320000 - Engineering design services - 71356000 - Technical services ## Release History - 22 Sep 2025 at 10:16 - TenderUpdate - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/058412-2025 - 27 Aug 2025 at 13:24 - TenderUpdate - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/051623-2025 - 27 Aug 2025 at 13:11 - TenderUpdate - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/051616-2025 - 27 Aug 2025 at 10:38 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/051536-2025 - 10 Jul 2025 at 13:09 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/038970-2025 ## Documents - https://www.find-tender.service.gov.uk/Notice/058412-2025 22nd September 2025 - Tender notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/051623-2025 27th August 2025 - Tender notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/051616-2025 27th August 2025 - Tender notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/051536-2025 27th August 2025 - Tender notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/038970-2025 10th July 2025 - Pipeline notice on Find a Tender ## Notice URLs - http://www.ssen.co.uk - https://sse.app.jaggaer.com/esop/guest/go/opportunity/detail?opportunityId=436 - https://www.legislation.gov.uk/ukpga/2023/54/contents ## Provenance This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-055cfb. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-055cfb.json.