Principal BESS Engineer, Procurement & Performance | Energy
14 hours ago
Newcastle upon Tyne
Overview As Principal BESS Engineer, you lead technical and commercial advisory for utility-scale battery energy storage systems across development to operation. You translate technical depth into bankable requirements and robust procurement decisions, guiding clients through sizing, specifications and contract terms. You’ll oversee cross-disciplinary interfaces and rigorous evaluations to ensure reliable, cost-effective performance over the system’s life. This role combines engineering excellence with commercial acumen to shape ambitious energy storage projects and long-term value for clients. Pay / BenefitsFlexible work arrangementsAdditional annual leave up to 6 weeksVolunteer and representation leaveFlex public holidays ResponsibilitiesLead BESS Owners Engineer and technical advisory engagements across feasibility, procurement, contracting, design, construction, commissioning and operationEstablish sizing and performance basis using dispatch duty, grid requirements, site conditions and lifecycle objectivesPrepare and review Principals requirements, technical schedules and guarantees for net power, energy, efficiency, availability and reliabilityLead tender evaluations, normalize offers, assess assumptions and technical risksSupport contract negotiations on performance guarantees, tests, warranties, liquidated damages, interfaces and long-term obligationsReview BESS architecture and interfaces across cells, modules, racks, BMS, PM/plant control systems, MV systems, thermal, fire safety and grid connection; coordinate specialists and mentor team members Key requirements8+ years in energy sector with utility-scale BESS experienceExperience across development, procurement, delivery or operation, with exposure to multiple roles (consulting, developer, OEM, integrator, EPC, lender)Strong ability to move between sizing, technical specs, vendor proposals and contract schedulesUnderstanding of BESS performance criteria and guarantees and how to align duty, boundaries, degradation and warrantiesclient engagement and communicationability to influence and build trusted relationships across technical, procurement, and executive teamsstrong coordination and leadership across interfaces (electrical, civil, fire, grid, operations)BESS sizing and operating-duty definition (power/energy, SOC windows, C-rate, cycling, augmentation)Performance guarantees and acceptance testing (net power, energy, efficiency, availability)Tender evaluation and bid normalization (assumptions, exclusions, design margins)