Engineer-Level 3 - Senior

Sr. Engineer - BESS Technology SME Overview

Battery Technology & Sizing Lead (Sr. Engineer)

Location:

Juno Beach, FL

Client Resources is the world's largest generator of renewable energy from the wind and sun, and a world leader in battery storage. We provide energy-related products and services that grow our economy, protect the environment, support our communities, and help customers meet their energy needs. We are leading the decarbonization of the U.S. economy with our goal to reach Real Zero carbon emissions from our operations by 2045 while improving customer affordability and reliability.

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.

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…