Principal Cable System Design Engineer; Transmission & Distribution

Due to a fantastic period of growth, we are seeking a Principal Cable System Design Engineer to join our expanding Transmission & Distribution (T&D) team within AECOM. This is a senior role within the business, with responsibility for driving technical excellence, leading complex projects, and supporting strategic client engagement across a broad portfolio of high-voltage infrastructure schemes. As a Principal Engineer, you will play a critical role in the planning, design, and delivery of cable systems across multiple voltage levels.

Our clients include Transmission System Operators, Distribution Network Operators, private developers , and international energy majors across the UK and globally. You will be a trusted advisor to clients, and contribute to developing our technical standards, innovation strategy, and digital delivery approach within the cable engineering space. This is a fantastic opportunity to contribute to some of the most exciting infrastructure and energy transition projects in the world including National Grid's Great Grid Upgrade.

Here's what you will do:

• Assist with leading the delivery of large-scale HV/EHV cable system projects from concept to completion, ensuring quality, safety, and innovation throughout the lifecycle.
• Develop and oversee HV cable system designs, including routing, burial risk assessments, thermal, electromagnetic, and mechanical performance modelling.
• Provide expert-level input into cable system ratings, installation methodologies, jointing arrangements, cleating design, and system integration in challenging environments.
• Guide and validate complex calculations including ampacity, short circuit forces, EMC, induced voltages, and thermomechanical forces to meet compliance with National Grid TPs, IEC, and CIGRÉ standards.
• Undertake client and stakeholder engagement, providing technical assurance, strategic direction, and value-engineered solutions on high-profile infrastructure programmes.
• Manage coordination between disciplines, including civil, structural, OHL, substation, and marine engineering inputs, to ensure cohesive and integrated design solutions.
• Drive project execution, managing technical risks, interfaces, and quality reviews while supporting procurement, construction, and commissioning phases.
• Conduct 3rd-party inspections, FAT/SAT witnessing and vendor oversight for cable and ancillary equipment.
• Champion mentorship, knowledge-sharing, and technical development within the wider team, supporting capability growth in cable systems engineering.
• Support business development activities, including proposals, bid reviews, and client presentations.

Ready to push the limits of what's possible?

• Demonstrated experience as a technical leader in HV/EHV cable system design.
• Proven track record in design, specification, and installation of complex cable systems including tunnel, urban, and constrained environments.
• In-depth understanding of international and UK-specific standards, particularly National Grid TPs, IEC, and CIGRÉ guidelines.
• Experience working in regulated, quality-assured environments-preferably with National Grid, SSE, Eir Grid, or equivalent TSO/DNOs.
• Strong ability to coordinate multidisciplinary engineering teams and engage with senior stakeholders across the project lifecycle.
• Excellent communication, client-facing, and team leadership/mentorship skills.
• Commitment to fostering innovation, digital delivery, and sustainability in design.

• Degree-qualified in Electrical Engineering or related field; MSc/MEng advantageous.
• Chartered Engineer (CEng) status or working towards.
• National Grid CDAE certification or similar.
• Experience with cable system software (e.g., CYMCAP, Win Cable) and advanced analysis tools.
• Work with Us. Change the World.

At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world's most complex challenges and build legacies for future generations. There has never been a better time to be h accelerating infrastructure investment worldwide, our services are in great demand.

We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other…