Sr. Engineer - BESS Technology

Job Title: Sr. Engineer - BESS Technology

Location: Juno Beach, FL

Duration: 12 months renewable contract

Overview

Job Summary: The Utility Scale Energy Storage team is looking for an innovative and dynamic engineer to

serve as the Battery Technology & Sizing Lead in a key Sr. Engineering role. The successful candidate will

support the team as a Subject Matter Expert (SME) in evaluating existing and emerging energy storage

technologies, including battery technologies, PCS/power electronics, and alternative energy storage

solutions. The role will focus on assessing technology performance, technical maturity, commercial

readiness, cost, and applicability to utility-scale projects and new use cases, while also providing strong

technical expertise in BESS sizing and system optimization.

The successful candidate will lead BESS sizing methodologies, manage system losses and project

specific assumptions, and ensure optimized solutions aligned with power purchase agreements and

other project requirements. The candidate will also be expected to continuously improve BESS sizing

tools and engineering processes. Experience applying AI, automation, data analytics, or software tools to

engineering applications is preferred, along with an open and innovative mindset toward adopting

emerging technologies to improve engineering quality, efficiency, and decision-making.

This position generally prefers in-person office presence at Juno Beach headquarters but offers hybrid

options for the right candidate.

Key Responsibilities

1. BESS Sizing & Optimization SME

• Support the lead Subject Matter Expert (SME) for utility-scale BESS sizing, providing technical

leadership on sizing methodology, assumptions, optimization, and project-specific sizing

decisions.

• Develop and optimize end-to-end BESS sizing from the point of interconnection through

GSU/substation, PCS/inverters, DC system, and battery, accounting for system losses,

degradation, augmentation/overbuild strategies, temperature, operating constraints, and

contractual requirements.

• Own and continuously improve BESS sizing methodologies, calculators, assumptions, and

technical guidance to ensure consistent and accurate sizing across projects.

• Organize and maintain a clear tracking record of sizing assumptions, inputs, decisions, and

results from early-stage development through project execution.

• Review project-specific sizing results, identify optimization opportunities and technical risks, and

provide sizing recommendations to Engineering, Development, Supply Chain, and project teams.

• Fully own and maintain the sizing tools to ensure the latest and greatest BESS and PCS

equipment ratings are incorporated in the sizing database

2. Technology Evaluation

• Support the lead SME in the team to assess and evaluate new and existing battery technologies

and their applicability to utility-scale systems.

• Conduct thorough technical evaluations and performance assessments such as degradation,

efficiency, available energy, and overall reliability, SOC/SOH, encompassing battery cells,

modules and system. And utilization of Claude, VS Code, Devon Desktop, etc. to build tools for

performance prediction.

• Evaluate non-lithium-ion and emerging energy storage technologies for new and evolving use

cases, regional market demand, assessing technical maturity, performance, safety, scalability,

supply chain readiness, and commercial viability.

• Develop preliminary system sizing and CAPEX estimates for alternative energy storage

technologies to support technology selection, business-case development, and pilot or

commercial deployment decisions.

• Utilize the annual technology RFP and RFI database from major and emerging energy storage

technology vendors to track and visualize technology advancements, product roadmaps,

performance, and commercial readiness, and provide a concise summary of key findings and

recommendations to management.

3. Digital Tools, Automation & AI

• Develop and improve engineering tools that automate BESS sizing, technical evaluations, battery

performance forecast, and repetitive engineering workflows.

• Utilization of AI, automation, data analytics, or software-based tools to improve engineering

productivity and decision-making is preferred.

• Experience developing engineering tools using Excel/VBA, Python, Power BI, low-code platforms,

AI tools, or similar technologies is preferred.

• Demonstrated curiosity and willingness to adopt emerging technologies, including AI, and identify

practical applications that improve engineering quality, speed, consistency, and knowledge

sharing in a dynamic environment.

• Partner with software development and other technical teams to translate engineering

methodologies into scalable digital tools and automated workflows.

Qualifications

• Bachelor's or Master's degree in Electrical Engineering, Mechanical Engineering, Chemical

Engineering, Materials Engineering, or a related field.

• Demonstrated expertise in utility-scale BESS sizing and optimization, including AC/DC sizing,

degradation, system losses, augmentation/overbuild, thermal impacts, and project-specific

operating requirements.

• Experience with alternative chemistry technologies, such as flow battery, multi-day storage

system, fuel-cell-like technologies, sodium ion battery, supercapacitor. Background in IGBT and

SiC inverters is a plus.

• Established experience in the energy storage industry with a strong professional network and

demonstrated relationships with major and emerging battery and/or PCS vendors.

• Experience applying AI, automation, programming, or advanced data-analysis tools to

engineering problems is strongly preferred.

• Ability to combine strong engineering fundamentals with an innovative mindset and willingness to

challenge and improve existing engineering processes.

• Excellent document and folder organizational skills for easy access and retrieval and data base

tracking.

• Excellent project management, communication, and leadership abilities.

• Willingness to travel to battery manufacturing sites for technology assessments.