Senior High Voltage Electrical Engineer, Data Centers

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JLL is seeking an experienced Senior High Voltage Electrical Engineer to lead the design and engineering of critical electrical infrastructure for hyperscale data centers and mission-critical facilities. This role provides technical leadership for complex capital projects involving high voltage electrical systems, utility-scale substations, on-site generation, and renewable energy integration.

You will serve as the technical authority on data center electrical infrastructure projects, leading system architecture development, utility coordination, and engineering oversight from concept through commissioning. This position requires deep expertise in medium voltage and high voltage power distribution, substation design, and generation technologies specific to large-scale data center operations.

Lead design and engineering of high voltage electrical systems for hyperscale data center campuses including medium voltage (4.16kV-35kV) and utility voltage (69kV-230kV) distribution infrastructure. Develop comprehensive electrical system architectures optimizing reliability, redundancy, and scalability for mission-critical computing loads with N+1, 2N, and 2N+1 configurations.

Design utility-scale substations serving multi-hundred megawatt data center campuses including primary and secondary substation configurations, ring bus schemes, and campus loop distribution systems. Develop single-line diagrams, protection schematics, and substation layouts incorporating digital relaying and substation automation.

Perform complex electrical system studies including load flow analysis, short circuit calculations, arc flash hazard assessments, transient stability analysis, harmonic analysis, and protective device coordination. Utilize advanced modeling software to optimize system performance and validate design decisions.

Lead utility interconnection strategy and design for developments requiring 100+ MW of utility capacity. Navigate complex utility engineering processes, transmission planning studies, and interconnection agreements with multiple utility providers.

Architect electrical distribution systems for hyperscale data centers with power densities of 10-50+ MW per building and rack densities from 10-100+ kW. Design medium voltage distribution loops, unit substations, and diverse utility feeds supporting Tier III and Tier IV availability requirements.

Develop campus electrical master plans supporting phased build-out of multi-building data center campuses with total capacity exceeding 500 MW. Create infrastructure roadmaps accommodating future expansion and technology evolution while optimizing capital efficiency.

Design redundant power architectures supporting concurrent maintainability requirements. Develop switching schemes, isolation strategies, and maintenance bypass configurations enabling full system maintenance without impacting critical load.

Lead integration of sustainable power solutions including on-site solar arrays, battery energy storage systems (BESS), fuel cells, and microgrids. Design systems supporting corporate sustainability…