Senior BESS Engineer – Sizing & Battery Technology
Location:
Juno Beach, FL – Hybrid
Contract:
12 Months
Pay Rate:
Up to $52.96 per hour
We are seeking an experienced Senior BESS Engineer to support a Utility Scale Energy Storage team, providing technical expertise across battery energy storage system (BESS) sizing, optimization, battery technology and power conversion systems (PCS).
This position will serve as a technical Subject Matter Expert supporting utility-scale energy storage projects and the evaluation of existing and emerging storage technologies.
The successful candidate will combine strong engineering fundamentals with hands-on BESS sizing experience and an innovative approach to engineering tools, automation, data analytics and emerging technologies.
BESS Sizing & Optimization
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Provide technical leadership for utility-scale BESS sizing methodologies, assumptions, optimization and project-specific sizing decisions.
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Develop and optimize end-to-end BESS sizing from the point of interconnection through GSU/substation, PCS/inverters, DC systems and battery equipment.
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Account for system losses, battery degradation, augmentation and overbuild strategies, temperature effects, operating constraints and contractual requirements.
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Ensure sizing solutions align with power purchase agreements and project-specific technical requirements.
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Develop, maintain and continuously improve BESS sizing methodologies, calculators, assumptions and technical guidance.
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Maintain accurate records of sizing inputs, assumptions, technical decisions and results throughout project development and execution.
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Review project-specific sizing results and identify optimization opportunities, risks and potential improvements.
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Provide sizing recommendations to Engineering, Development, Supply Chain and project teams.
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Maintain sizing tools and equipment databases to incorporate current BESS and PCS ratings and technical characteristics.
Battery & Energy Storage Technology Evaluation
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Evaluate existing and emerging battery technologies for utility-scale applications.
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Perform technical assessments covering degradation, efficiency, available energy, reliability, state of charge (SOC) and state of health (SOH).
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Evaluate battery performance from cell and module level through complete system applications.
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Assess emerging and alternative energy storage technologies for new use cases and regional market requirements.
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Evaluate technologies based on technical maturity, performance, safety, scalability, supply chain readiness and commercial viability.
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Develop preliminary system sizing and CAPEX estimates for alternative energy storage technologies.
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Support technology selection, business-case development, pilot projects and commercial deployment decisions.
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Analyze vendor RFP and RFI information to track technology developments, product roadmaps, performance and commercial readiness.
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Summarize technical findings and provide recommendations to engineering and management teams.
Digital Engineering, Automation & AI
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Develop and improve engineering tools used for BESS sizing, technical evaluations and battery performance forecasting.
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Automate repetitive engineering calculations and workflows where appropriate.
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Apply data analytics and software-based tools to improve engineering productivity, consistency and decision-making.
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Utilize tools such as Excel/VBA, Python, Power BI, low-code platforms and AI-assisted engineering applications where appropriate.
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Identify practical applications for emerging technologies and AI within energy storage engineering.
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Partner with software development and technical teams to translate engineering methodologies into scalable digital tools and automated workflows.
Qualifications
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Bachelor's or Master's degree in Electrical Engineering, Mechanical Engineering, Chemical Engineering, Materials Engineering, or a related technical discipline.
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Demonstrated experience with utility-scale battery energy storage systems (BESS).
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Strong expertise in BESS sizing and optimization, including AC/DC sizing, system losses, degradation, augmentation/overbuild strategies, thermal impacts and project-specific operating requirements.
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Knowledge of battery technologies and utility-scale energy storage system architecture.
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Experience evaluating battery and/or PCS technologies.
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Strong analytical and engineering problem-solving skills.
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Excellent project management, communication and organizational capabilities.
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Ability to communicate complex technical findings and recommendations across engineering and business teams.
Preferred Experience
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Experience with emerging or alternative storage technologies such as flow batteries, multi-day energy storage, sodium-ion batteries, fuel-cell-like technologies or supercapacitors.
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Knowledge of power electronics, including PCS/inverters, IGBT and SiC technologies.
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Experience working with major or emerging battery and PCS suppliers.
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Experience applying Python, Excel/VBA, Power BI, automation, AI or advanced data analytics to engineering applications.
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Experience developing engineering calculation, sizing or performance-prediction tools.
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Understanding of utility-scale energy storage commercial and project requirements.
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Strong interest in emerging battery technologies and continuously improving existing engineering processes.
Some travel to battery manufacturing facilities may be required to support technology assessments.
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