This is an opportunity to take full technical ownership of the secondary engineering scope on complex HV substation projects, working from concept design through to execution. You will play a key role in delivering reliable protection, control, communication, and auxiliary systems that support critical energy infrastructure across the Netherlands. Vacancy InformationAs Senior Secondary Design Engineer, you will lead the detailed secondary engineering on HV substation projects up to 500kV. Your work covers the full scope of secondary systems including protection philosophies, control narratives, wiring diagrams, panel layouts, auxiliary power systems, and substation communication networks. You will be involved from early concept design through to detailed execution and your technical ownership of deliverables is expected throughout. Key ResponsibilitiesLeading detailed secondary engineering for HV substations up to 500kV.Developing protection philosophies, functional specifications, and control narratives.Designing protection and control schemes, wiring diagrams, and panel layouts.Performing AC and DC calculations, CT and VT sizing, cable sizing, and relay selection.Engineering auxiliary power systems and substation communication networks.Collaborating with multidisciplinary teams to deliver complete, high-quality engineering packages. What You Need10 or more years of experience in secondary engineering for HV substations.Strong experience in protection and control design with proven expertise in panel design, wiring, and schematic drawings.Solid knowledge of protection relays, telecom systems, and LAN networks.Experience with detailed engineering of transmission infrastructure.Fluent in English, both written and spoken.IEC 61850 experience.Battery sizing knowledge.Medium-voltage project experience.ELCAD-AUCOPLAN experience. If you do not meet every requirement but have a strong electrical engineering background with relevant industrial experience, we still encourage you to apply. The right combination of technical experience, motivation, and willingness to grow can make you a strong candidate. RelocationThis position is based in the Netherlands and will require relocation. We understand that making an international move is a significant decision and we are here to make that process as straightforward as possible.As part of your contract, FairPlay Engineering provides a Premium Relocation Package. This includes visa sponsorship, guidance before your move, and dedicated support from a relocation consultant throughout the process. You can find more information on the Relocating with us page on our website. ApplyWe appreciate every application we receive. Because this is a specialised role, we will contact candidates whose experience closely matches the requirements.If you have not heard from us within two weeks, your application has unfortunately not been selected for the next step. FairPlay Engineering specialises in recruiting engineers for roles in the Netherlands. If this vacancy is not the right match for you, keep an eye on our vacancies page for future opportunities.