Location/s: Brighton, Croydon, Glasgow , York

Relocation supported: Not supported, but internal applications are welcome

Recruiter contact: Abhijeet Barpanda

Hiring manager contact: Henry Smith

Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance - we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you're surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott MacDonald is where people come to be brilliant.

About the business unit

The Energy unit delivers services to clients globally across several sectors including hydropower, nuclear, waste, renewable generation and transmission & distribution networks. Together we provide integrated engineering and project management services across the project lifecycle - from concept and design to construction and operations, to decommissioning or repowering and life extension. Together with our clients, we're helping to deliver the energy transition globally.

Overview of role

The Energy Unit,



specifically the Transmission & Distribution division are recruiting for a Secondary Design Interface Engineer to join our team. Our work is varied and spans across all forms of Renewable Power Generation, Network Design, Grid Connections, Net Zero Carbon aspirations and Estate Management Planning. We also provide detailed design solutions in the renewables, aviation, data centre, healthcare, nuclear and defence sectors.

Job description:

The Secondary Design Interface Engineer will play a crucial role in the design and implementation of secondary systems within HV electrical substations. This position involves coordinating with various stakeholders, ensuring compliance with industry standards, and optimizing the design process to enhance system reliability and performance.

Typical activities include:

- Design Coordination: Collaborate with primary design engineers, project managers, and other stakeholders to develop comprehensive secondary system designs.
- Technical Specifications: Prepare and review technical specifications, drawings, and documentation for substation secondary systems, including protection, control, and communication systems.
- Drawings Preparation: Prepare interface circuit diagrams, wiring diagrams, cable schedules, block diagrams, and room layouts.
- Calculations: Calculate battery sizes, voltage drop and cable sizing.
- HV Equipment Familiarity:



HV plant equipment at 132kV, 275kV, and 400kV for AIS & GIS substations.
- SCADA Systems: Knowledge of SCADA systems and I/O interface.
- Compliance and Standards: Ensure all designs comply with relevant industry and client standards, regulations, and company policies mainly in UK.
- Project Management: Manage design scope secondary design, ensuring timely delivery and adherence to budget constraints.
- Risk Assessment: Conduct risk assessments and develop mitigation strategies to address potential design and implementation challenges.
- Innovation and Improvement: Identify opportunities for innovation and continuous improvement in design processes and technologies.
- Stakeholder Engagement: Maintain effective communication with internal and external stakeholders, including clients, contractors, and regulatory bodies.
- Site Visits: Willingness to travel for site visits and site surveys, primarily within the

Candidate specification:

Working as part of a Team and reporting to the Project Principal or Principal Engineer, we are ideally looking for candidates who are Chartered, along with:

- Education: Bachelor's degree in Electrical Engineering or a related field.
- Experience: Good level of experience in secondary system design within the HV power industry.
- Technical Skills: Very valuable knowledge of protection and control systems, and familiarity with industry standards (e.g., IEC, IEEE). NGTS would be an advantage.
- Project Management: Strong project management skills, with the ability to handle multiple projects simultaneously.
- Communication: Excellent verbal and written communication skills, with the ability to conve

📌 Principal Protection Design Interface Engineer (Brighton)
🏢 Mott Macdonald
📍 Brighton