Job Description Start here. Grow here. “Are you ready to join a team of talented engineers to p ower the future, shape the grid and lead with impact ?” We are seeking a Principal Cables Engineer to join our expanding Transmission & Distribution (T&D) team within AECOM. This is a senior leadership 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, spanning both onshore and offshore environments, including HVAC and HVDC applications. Our clients include Transmission System Operators, Distribution Network Operators, private developers, and international energy majors across the UK and globally. You will lead multidisciplinary project teams, act as 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 be at the forefront of energy transition, delivering world-class solutions for projects that are shaping the grid of tomorrow. Here’s what you will do: Lead the technical delivery of large-scale HV/EHV cable system projects from concept to completion, ensuring quality, safety, and innovation throughout the lifecycle. Develop and oversee HVAC and HVDC 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 (e.g., subsea, tunnel, urban). 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. Lead 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. Come grow with us. Become part of our dynamic T&D team, which boasts a team of leading and innovating industry experts. Collaborate with top-tier civil, mechanical, electrical, and process engineers to deliver a variety of captivating projects, from small initiatives to large-scale ventures, all the way from concept to completion. At AECOM, you’ll thrive in an inclusive and forward-thinking environment where your contributions are valued. And let's not forget about the perks at AECOM. You'll enjoy a range of core and personalised benefits designed to support your future and well-being, customised to fit your lifestyle. Take advantage of career development opportunities, our flexible hybrid working model to ensure a work-life balance that suits your lifestyle, technical practice networks, AECOM University, and volunteering days. Why Join Us: Be part of a dynamic team that tackles challenging and impactful projects. Work alongside industry-leading professionals and thought leaders. Engage in a collaborative and inclusive work environment. Access to continuous learning and development opportunities. Competitive salary and comprehensive benefits package.