HV Cable Designer

The Senior HV/EHV Cable Design Engineer will act as the company's technical authority for high‑voltage and extra‑high‑voltage underground cable systems up to 400 kV AC within the UK. This role provides expert leadership across all stages of cable system design - from feasibility and concept design through detailed engineering, installation support, commissioning input, and lifecycle performance assessment. The postholder will set engineering standards, ensure compliance with UK transmission and distribution requirements, and support business growth through deep technical capability.

• Serve as the company's subject matter expert for HV/EHV cable system design up to 400 kV AC.
• Develop and maintain engineering standards, design methodologies, and quality assurance processes relating to underground cable systems.
• Provide expert oversight on thermal analysis, route engineering, earthing studies, jointing methodologies, system performance, and asset ratings.
• Lead and/or review concept, FEED, and detailed designs for major onshore cable projects.
• Produce and verify cable system design documentation including cable ratings, sheath bonding calculations, trench profiles, fault studies, pulling calculations, and installation methodologies.
• Undertake or approve technical risk assessments and mitigation strategies during design stages.
• Provide specialist technical support to construction and commissioning teams, including interpretation of test results and resolution of complex issues.
• Ensure designs comply with UK regulatory, utility and industry standards (e.g., NG ESO/NGED/SSEN requirements, IEC, CENELEC, ENA, Cigre guidelines).
• Maintain awareness of changes in relevant legislation, specifications, and good practice, advising the company accordingly.
• Provide expert input into CDM design risk registers and safety‑by‑design principles.
• Act as, or provide technical support to, the Contractor Design Assurance Engineer (CDAE) or Lead Contractor Design Assurance Engineer (LCDAE) role, where applicable.
• Guide internal teams on design assurance, technical governance, and project approval processes.
• Lead the evaluation and adoption of new cable technologies, materials, and installation techniques.
• Contribute to research, development, and internal training programs to uplift the organisation's cable engineering capability.
• Represent the company in technical meetings with clients, suppliers, manufacturers, and statutory bodies.
• Prepare and deliver high‑quality technical reports, presentations, and design justifications.
• Support business development through technical bids, scopes, and client advisory services.

• Extensive demonstrable experience in the design and analysis of HV/EHV cable systems (DC, 11 kV – 400 kV AC) within the UK electrical infrastructure environment.
• Demonstrable expertise in cable ratings, thermal modelling, bonding & earthing, system layout, and installation engineering.
• Proven track record of delivering complex cable projects for Transmission Operators (TOs), Distribution Network Operators (DNOs), ICPs or major EPC contractors.
• In‑depth understanding of IEC 60287, IEC 60840, IEC 62067, CENELEC standards, ENA TS documents, and TO‑specific specifications.
• Experience performing or holding the CDAE or LCDAE role for HV/EHV cabling (highly advantageous).
• Strong communication skills with the ability to influence technical decisions at senior levels.
• Degree in Electrical Engineering or related discipline;
  Chartered Engineer status preferred.

• Highly analytical with strong problem‑solving capability.
• Detail‑orientated with a structured approach to engineering assurance.
• Collaborative, supportive, and capable of mentoring junior engineers.
• Confident representing the company as a technical authority.

• Virtual GP available via video or phone.
• Financial wellbeing assistance through the Salary Finance scheme, with access up to 50% of earned pay before payday for a small fee.
• Flexible lifestyle benefits platform, Choices, allowing purchase of up to five extra days’ holiday, critical illness insurance, dental treatment, and technology products at affordable cost.
• High street discounts from thousands of retailers, gyms, and other partners through the MiDeals platform.
• Cycle‑to‑work scheme.
• Life cover of up to four times salary.
• Enhanced pension contributions, a save‑as‑you‑earn scheme, and Mitie Matching Share Plan (with the possibility of free shares).
• Recognition through Mitie Stars, with monthly cash prizes and a top prize of up to £10,000.
• Various training and development opportunities via a wide selection of learning resources.

Since 1987, Mitie’s 80,000 employees have been maintaining companies globally. We are the UK’s leading facilities management and professional services company, and our clients range from household names in banking, critical government sites as well as hospitals and schools.