Primary Electrical Design Engineer

Mott MacDonald Bentley (MMB) are currently looking for a Primary Electrical Design Engineer to join our growing battery energy storage system (BESS) team. You will provide subject matter expertise and collaborate with an experienced and knowledgeable team of engineers and designers, as well as supporting and mentoring junior members of the team.

As part of the wider design team, the role of the Primary Electrical Design Engineer is to lead the production of electrical layouts for substations (including AIS / GIS up to 400kV), cable route layout drawings & sections, LV layouts, switch room and control room equipment layouts and site earthing layouts etc. This dynamic role will be hybrid and involve a combination of site, office and remote working.

As part of Mott MacDonald Group, the role will offer the opportunity to work with other industry-leading specialists to deliver flagship industry projects. Within MMB, the role also offers the unique opportunity to work as part of a fully integrated design-and-build project, liaising closely construction and commissioning teams throughout to ensure the successful end‑to‑end delivery of the project.

As Primary / Senior HV Electrical Design Engineer you will:

• Determine the base electrical site layout for a project covering adoptable and private assets, accounting for the need to bring external services / connections to each item of plant or equipment, and in compliance with project DNO / IDNO / client requirements.
• Help to co-ordinate systems studies, assisting with compiling and communicating information for these to be completed and ensuring that outputs are incorporated into the detailed design and associated equipment specifications.
• Contribute to the production of specifications for major items of plant and equipment such as disconnectors, CTs, VTs, SAs, PIs and for more complex items such as circuit breakers and transformers, and approval of manufacturer information.
• Design of equipment support structures for AIS electrical equipment from 66kV to 400kV, including conveying requirements to the manufacturer, and approval of manufacturer information.
• Lead the electrical design integration of inverters, BESS enclosures, PCS units, transformers and auxiliary systems to the grid connection point.
• Produce site wide ducting / cabling layout drawings, coordinating requirements with other engineering disciplines. The candidate should have a working knowledge of cable types and installation techniques, ideally from 11kV up to 400kV.
• Develop earthing layouts for sites at all voltage levels, from first principles, that can be verified by the earthing designer.
• Liaise with and support the installation and commissioning teams to ensure that the system is installed and tested in accordance with the design.
• Contribute to development of standardised systems, processes, designs and specifications.

A Degree/HND/HNC in Electrical Engineering (Power Systems Electrical preferred).

• Previous experience of primary electrical design with a consultancy, contractor or utility in the Power industry.
• Experienced in the design of HV AC power systems. Have demonstrable experience in producing electrical layout drawings for substations, switchrooms, control rooms and balance of plant projects that may be privately owned or have elements adopted by the host DNO;
• 11kV distribution networks
• 22kV distribution networks
• 33kV switchrooms and control rooms
• 66kV-400kV AIS substations
• Understanding of industry HV and EHV substation installation standards and specifications, including a demonstrable working understanding of TO / DNO specifications.
• Understanding of cable installation types, their requirements and installation parameters.
• Ability to take the initiative, demonstrate a pro‑active approach to activities and problems.

Mott MacDonald is a global engineering, management and development consultancy.

Our purpose is to improve society by considering social outcomes in everything we do, relentlessly focusing on excellence and digital innovation, transforming our clients' businesses, our communities and employee opportunities.

A fundamental part of this is respecting each person's differences and striving to meet their needs.

Our values: progress, respect, integrity, drive, excellence.

We believe that because we care about what we do, we do things better.

We know that our people are our most valuable asset, so we are dedicated to investing in them, through our comprehensive training and development schemes, exposure to the wider design and build business and endless opportunities.

We are committed to creating a workplace where our people are safe, have a voice, can reach their full potential, and everyone shares in the rewards.

You’ll have the opportunity to contribute to projects that benefit our communities - from helping to secure water supplies for future generations to protecting homes and businesses from flood risk - our projects make a real difference., Mott MacDonald Bentley is a fully integrated design and build business with access to the design expertise of Mott MacDonald with the contracting experience of JN Bentley, operating across energy, water and environment sectors throughout the UK. With an annual turnover surpassing £500 million, Mott Macdonald Bentley cements its position as a leader within the industry. The sustained, robust business performance creates an ideal environment for career growth.

MMB are committed to empowering our people to grow professionally and thrive in their careers. We offer structured development schemes that support your journey toward professional chartership. From day one, employees are fast‑tracked towards chartership reviews and benefit from mentorship, hands‑on experience, and tailored training opportunities

Mott MacDonald Bentley are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision is as a consequence of the changes made to the Skilled Worker route by the UK Government in April 2024. We continue to welcome applications from candidates who are eligible for alternative immigration routes in the UK, that do not require sponsorship as a Skilled Worker now or in future.