Locations: London, Leeds, Sheffield (can be anywhere in the UK but flexible with travelling to office / site) Role: Protection & Control Design Engineer specialising in battery energy storage system (BESS) integration with HV substations and networks. Responsible for leading the design and development of HV protection and control schemes (11kV–132kV) for BESS projects interfacing with TO/DNO networks. Key responsibilities include developing protection schemes for transformers, feeders, switchgear and BESS inverters, producing AC/DC schematics, relay logic diagrams, wiring and cable schedules, and supporting protection settings and coordination studies. Experienced in CT/VT specification, relay and protection panel design, and contributing to short-circuit, load flow and fault-level analysis. Also involved in SCADA integration, communications architecture and signal development for BESS, PCS and substation equipment, ensuring compliance with G99/G100, G81, and UK grid standards. Works closely with multidisciplinary design, construction and commissioning teams to deliver end-to-end turnkey energy infrastructure projects, while supporting and mentoring junior engineers. Background : Electrical Engineering degree/HND/HNC with experience in HV/EHV protection design within utilities, contractors or consultancies, and strong understanding of UK TO/DNO substation standards and specifications.