Sr. Energy Storage Engineer

SB Energy; San Diego, San Francisco, Denver (CA, CA, CO); On-site; USD 140,000 - 230,000; Full time

Job summary

SB Energy, a SoftBank Group company headquartered in Redwood City, California, is seeking a Sr. Energy Storage Engineer to lead utility-scale energy storage design, optimization, and permitting.

You will work with cross-functional teams to deliver high-quality, cost-effective projects on aggressive schedules. The role requires deep expertise in lithium-ion storage systems, PCS, transformers, MV equipment, EMS/BMS/SCADA, and stringent interconnection standards.

Qualifications

• Minimum 8 years of experience in utility-scale Battery Energy Storage Systems.

Responsibilities

• Create and maintain Energy Storage engineering standards, technical specifications, and design requirements to ensure quality, reliability, constructability, and cost optimization.
• Lead technical reviews of utility-scale BESS projects through development, detailed design, construction, commissioning, and handover.
• Support Engineering and Construction teams by reviewing EPC deliverables and driving design optimization for cost, schedule, reliability, and operability.
• Develop and review preliminary electrical designs, site layouts, equipment sizing, single-line diagrams, and balance of plant (BOP).
• Lead technical evaluation and selection of batteries, PCS, transformers, MV equipment, EMS, BMS, SCADA, and auxiliary systems.
• Review and approve EPC engineering packages, calculations, RFIs, submittals, shop drawings, FAT/SAT plans, and commissioning procedures.
• Provide engineering support during construction by resolving technical issues, reviewing field changes, and coordinating with EPCs, OEMs, utilities, and AHJs.
• Lead technical discussions with utilities, AHJs, independent engineers, and code officials to resolve design and permitting issues.
• Support interconnection studies, system modeling, and compliance with utility, ISO/RTO, IEEE, UL, NFPA, NEC, and local code requirements.
• Lead commissioning activities, performance testing, substantial completion, and final project acceptance.
• Visit battery, PCS, and major equipment manufacturers to support technical due diligence, factory acceptance testing (FAT), and procurement activities.
• Support procurement by performing technical evaluations, developing approved vendor lists, and managing technical bid evaluations.
• Support Operations & Maintenance teams by providing troubleshooting and long-term technical guidance.
• Review emerging energy storage technologies and support pilot projects for next-generation storage solutions.
• Serve as the technical subject matter expert for Energy Storage across the organization.

Skills

Electrical Engineering

Power Systems

BESS

Project Leadership

Interconnection & Permitting

Team Collaboration

Equipment Selection

Education

B.S. in Electrical Engineering

M.S. in Electrical Engineering

PE license

Tools

SCADA

BMS

EMS

Job description

Do you want to work with high-caliber professionals in a dynamic and growing company? Are you entrepreneurial, hard-working, and collegial? Join us at SB Energy, a leading infrastructure company backed by SoftBank Group and Ares Infrastructure, pairing cutting-edge innovation with best-in-class execution. Our mission is to deliver reliable and secure data center and power infrastructure to strengthen America's future. Founded in 2019, SB Energy is a SoftBank Group company headquartered in Redwood City, California. In 2026, SoftBank Group and OpenAI announced a $1 billion investment to support SB Energy as their leading development and execution partner for data center campuses, while Ares Infrastructure continues its long-standing support of the company's growth. SB Energy develops, builds, owns, and operates some of the largest and most technically advanced energy and data center infrastructure projects in the United States. Since its founding, the company has rapidly grown into a top-tier integrated platform with more than 3 gigawatts (GW) in operation and a multi-GW pipeline of energy and data center infrastructure nationwide. SB Energy also leverages a strong culture of innovation to identify and integrate new technologies into its projects, including its AI-based digital platform, delivering energy infrastructure that is local, reliable, and matched to load. We are building the energy and infrastructure future—today. Come join us in accelerating the energy and infrastructure transition!

Title: Sr. Energy Storage Engineer

Basic Function

As a part of the Engineering team, the Sr. Energy Storage Engineer will provide subject matter expertise on Energy Storage design, optimization, final engineering, and construction permitting of utility-scale energy storage projects. The Sr. Energy Storage Engineer will have the ability to work independently while being able to contribute successfully to cross-functional teams. The Sr. Energy Storage Engineer will also have excellent organizational skills, be able to manage multiple projects at once, have excellent follow-through skills, and will have the ability to meet strict deadlines.

Responsibilities

• Create and maintain Energy Storage engineering standards, technical specifications, and design requirements to ensure quality, reliability, constructability, and cost optimization.
• Lead technical reviews of utility-scale BESS projects through development, detailed design, construction, commissioning, and handover.
• Support Engineering and Construction teams by reviewing EPC deliverables and driving design optimization for cost, schedule, reliability, and operability.
• Develop and review preliminary electrical designs, site layouts, equipment sizing, single-line diagrams, and balance of plant (BOP).
• Lead technical evaluation and selection of batteries, PCS, transformers, MV equipment, EMS, BMS, SCADA, and auxiliary systems.
• Review and approve EPC engineering packages, calculations, RFIs, submittals, shop drawings, FAT/SAT plans, and commissioning procedures.
• Provide engineering support during construction by resolving technical issues, reviewing field changes, and coordinating with EPCs, OEMs, utilities, and AHJs.
• Lead technical discussions with utilities, AHJs, independent engineers, and code officials to resolve design and permitting issues.
• Support interconnection studies, system modeling, and compliance with utility, ISO/RTO, IEEE, UL, NFPA, NEC, and local code requirements.
• Lead commissioning activities, performance testing, substantial completion, and final project acceptance.
• Visit battery, PCS, and major equipment manufacturers to support technical due diligence, factory acceptance testing (FAT), and procurement activities.
• Support procurement by performing technical evaluations, developing approved vendor lists, and managing technical bid evaluations.
• Support Operations & Maintenance teams by providing troubleshooting and long-term technical guidance.
• Review emerging energy storage technologies and support pilot projects for next-generation storage solutions.
• Serve as the technical subject matter expert for Energy Storage across the organization.

Qualifications/Requirements

• Minimum 8 years of experience in utility-scale Battery Energy Storage Systems (BESS), with significant experience in engineering, EPC execution, or owner's engineering.
• S. in Electrical Engineering (Power Systems preferred) from an ABET-accredited university; M.S. and PE license are preferred.
• Strong experience delivering projects through the complete lifecycle, including engineering, procurement, construction, commissioning, and commercial operation.
• Extensive experience working with EPC contractors and resolving engineering, construction, and commissioning issues.
• Strong knowledge of utility interconnection requirements, permitting processes, and coordination with utilities and AHJs.
• Experience supporting inspections, code compliance, and resolving AHJ comments through project completion.
• Deep understanding of lithium-ion battery technologies, PCS, transformers, MV systems, protection and controls, EMS, BMS, SCADA, and plant integration.
• Strong understanding of applicable codes and standards including IEEE, NEC, NFPA, UL, ANSI, and local jurisdiction requirements.
• Experience reviewing engineering calculations, protection studies, grounding, short-circuit, arc flash, relay coordination, and commissioning documentation.
• Experience supporting utility interconnection