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H&H is offering an exciting hybrid opportunity for a Senior Electrical Engineer to join our London office in the vibrant London Bridge area. H&H is a nationally recognized, full-service infrastructure engineering firm delivering innovative solutions that move communities forward. With more than 139 years of experience and over 600 professionals across 32 offices nationwide, we combine deep technical expertise with the agility of a privately owned firm. From planning and design through construction, we manage the full project life cycle while continually advancing our capabilities, strengthening our national presence, and investing in the people who power our growth. At H&H, you’ll join a firm that is building on its legacy by aligning expertise, expanding opportunity, and positioning itself for long-term, sustainable growth. Responsibilities Lead and deliver the electrical design of heavy movable structures such as movable bridges, locks, dams, travellers, and roofs, including power distribution, lighting, and control systems for operation and safety. Design, specify, and review control system architectures, including PLC-based systems, instrumentation, sensors, actuators, HMIs, and interfaces with mechanical and hydraulic systems. Prepare, review, and approve electrical and control system calculations, control philosophies, I/O schedules, cause-and-effect matrices, specifications, drawings, and testing documentation in accordance with UK and international standards. Support and oversee factory acceptance testing (FAT) and site acceptance testing (SAT), including review of test procedures, witnessing tests, and resolution of non-conformances. Lead and support site commissioning activities, ensuring control systems operate safely, reliably, and in accordance with the design intent and operational requirements. Provide technical input into the operation, maintenance, and fault-finding of control systems, including review of O&M manuals and support during the defects and handover period. Provide technical leadership and guidance to junior engineers and designers, including oversight of CAD production using AutoCAD, MicroStation, and 3D modelling software. Coordinate closely with mechanical, structural, and civil disciplines to ensure fully integrated, operable, and maintainable designs. Support the project team during tender and construction phases, including responding to technical queries and reviewing contractor submissions and temporary works interfaces. Undertake site visits and field work to inspect electrical and control system installations, witness testing and commissioning activities, and support defect resolution. Interface with clients, contractors, operators, and external stakeholders, providing clear technical input and representing H&H in a professional capacity. Requirements 15 to 20 years of experience in a similar electrical engineering or control systems role. Degree / HNC / HND / BTEC / NVQ qualified in Electrical Engineering, Control Engineering, or a related discipline. 15 to 20 years of experience in electrical and control systems for heavy infrastructure, industrial machinery, movable bridges, locks, dams, ports, or transportation projects (preferred). Demonstrated knowledge and interest in power distribution, control systems, instrumentation, and lighting. Proven experience in the design, testing, commissioning, and maintenance of PLC-based control systems and associated field devices. Ability to develop and review control philosophies, I/O schedules, cause-and-effect diagrams, wiring diagrams, and technical specifications. Familiarity with UK and international electrical standards and regulations (e.g. BS, EN, IEC, IET, Wiring Regulations). Ability to carry out electrical and control system calculations, including load assessments, cable sizing, and protection coordination. Previous experience supporting site installation, FAT/SAT, and commissioni