Company Description Work with Us. 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 professionals delivering projects that create a positive and tangible impact around the world. We're one global team driven by our common purpose to deliver a better world.

You will play a key role in delivering a range of cable system projects across multiple voltage levels, serving clients including Transmission System Operators, Distribution Network Operators, and private developers worldwide. In this crucial role, you will be a key member of our Transmission & Distribution team dedicated to leading and engaging with our clients to deliver technically challenging OHL design projects. Your primary focus in the role of Principal Engineer for HV Primary Substations is to provide project technical support and responsible for design of transmission projects.

This team will work on various projects encompassing overhead transmission lines up to 400kV. Preparation of designs and deliverables related to primary electrical systems for transmission and distribution projects. The tasks may encompass, but are not limited to, the following, depending on project requirements and the design phase: Design of primary substation systems, including AIS/GIS configurations, transformer installations, circuit breaker selection, busbar arrangements, switchgear layouts, and disconnectors for voltages up to 400kV.

Preparation of single-line diagrams (SLDs), general arrangement (GA) layouts, equipment sizing, and equipment layout plans for substations and transmission systems. Short-circuit force calculations, busbar sizing, fault current analysis, and equipment protection design,



ensuring system stability and protection under fault conditions. Design and integration of HVDC and HVAC systems, including converter stations, ensuring compatibility with the overall substation design.

Development of transformer layouts, including oil containment, busduct routing, and secondary system interfaces. Review and development of control and protection systems for primary substations, ensuring coordination with secondary systems and compliance with grid operator requirements. Coordination with civil teams to design and integrate foundations, steel structures, and electrical cable routes, ensuring seamless integration with the primary systems.

Development of equipment specification documents, bill of materials (BOM), and procurement support, ensuring the correct equipment is selected as per project requirements. Preparation of electrical interconnection diagrams, termination diagrams, cable schedules, and other supporting documentation for the installation and operation of primary systems. Underground cable design, including cable sizing, cable routing, and integration into existing systems, particularly for HV cable systems.

Coordination with external vendors and contractors to ensure the supply and installation of equipment in accordance with design specifications and project requirements. Master of Engineering degree (or equivalent education) in an appropriate engineering discipline from an accredited college or university.

Chartered

Engineer (CEng), or Professional Engineer (PE)



license or equivalent in the relevant field from any general organization (e.Institution of Electrical Engineers, UK) Prior experience in leading large design engineering teams performing Grid Substation design in a global consultancy firm is preferred. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D;, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan.

AECOM is the global infrastructure leader, committed to delivering a better world. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025.

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you'll have the resources to make a real impact.

Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you've always envisioned.

Career Area: Engineering Work Location Model: Hybrid

📌 Senior Engineer Manager (Madrid)
🏢 Aecom
📍 Madrid