HV Director - Critical Systems

Overview

Lead design & delivery of HV/LV critical power systems up to 33kV for resilient, low‑carbon projects

Key Responsibilities

• load flow
• hv design
• substation design
• network modelling
• protection studies
• etap analysis

Tasks

-Guidance on private HV network connections to Distribution Network Operators (DNOs), including G99/G100 compliance, load flow analysis, and fault level management. -Lead concept, feasibility, and detailed designs for HV and LV power distribution systems in mission-critical and industrial environments. -Design and specification of HV substations up to 33 kV, including switchgear selection, transformer sizing, protection coordination, and earthing system design. -Act as the UK electrical subject matter expert for all Critical Systems projects up to 33 kV. -Technical leadership for resilient electrical systems, incorporating redundancy topologies (N+1, 2N) and mitigation of single points of failure. -Undertake and review network modelling and analysis, including: -Collaborate with other Ramboll disciplines to deliver integrated, sustainable, and technically robust solutions. -Provide technical due diligence and assurance on electrical infrastructure projects. -Production and review of single-line diagrams (SLDs) and network protection studies, ensuring compliance with ENA, IEC, and BS standards. -Develop and review equipment specifications, protection philosophies, and earthing and bonding designs. -Supporting clients in future-proofing their electrical infrastructure for low-carbon technologies such as battery storage, renewable integration, and electric vehicle charging. -Support energy resilience and decarbonisation planning, integrating renewables and backup systems within client estates. -Leading technical assurance and governance to maintain the highest standards of quality across all electrical deliverables. -Use and oversee studies using ETAP, Trimble, or equivalent power system analysis software.

Requirements

• etap
• chartered engineer
• electrical degree
• protection studies
• hv networks
• stakeholder management

What You Bring

-Proficiency in power system analysis software such as ETAP, Trimble or equivalent. -Chartered Engineer (CEng) status, ideally with the IET. -Degree in Electrical Engineering or a related discipline, with experience in HV and LV design. -Excellent communication and stakeholder management skills, with the ability to translate technical detail into clear commercial and operational outcomes. -Strong understanding of resilience and redundancy architectures (N+1, 2N) and their application to critical systems. -Demonstrated capability in protection studies, fault analysis, load flow, and arc flash assessments. -Knowledge of low-carbon and energy transition technologies, including battery energy storage systems (BESS) and renewable integration. -Proven experience in private HV networks up to 33 kV, including substation design, switchgear specification, and protection coordination. -Experience with DNO interfaces, G99 compliance, and relevant ENA standards. -Protection coordination studies

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Benefits

-Private medical cover and life assurance. -Matched pension contributions. -27 days annual leave plus bank holidays. -Flexible work environment.

About Ramboll

-Evolved from a Nordic firm into a multinational player with offices in over 35 countries. -Renowned for landmark infrastructure: Öresund Bridge, Great Belt Bridge, Copenhagen Opera House, Tate Modern extension. -Offers multidisciplinary services spanning structural design, geotechnical, HVAC, traffic, environmental and digital engineering. -Typical projects include urban transport systems, cultural icons, energy plants, water infrastructure and environmental assessments. -Unusual engagements: projects in Antarctica and immersive tunnels like Fehmarn Belt. -Owned by an independent foundation, enabling long-term investment in innovation and reinvestment into the firm.

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