Senior Engineer - Battery Energy Storage Systems

E2 Consulting Engineers, Inc. • Pasadena, CA

1d • $150,000 - $200,000 • Onsite

About The Position

E2 is seeking a Senior Engineer to lead the engineering and design of utility-scale Battery Energy Storage System (BESS) projects. This role is responsible for delivering complete, coordinated designs from early development through detailed engineering and construction support.
The candidate brings strong experience in power systems, renewable integration, and multi-discipline coordination, with the ability to lead complex projects involving high-voltage interconnections, battery systems, and grid compliance requirements.

Requirements

• Bachelor’s degree in Electrical Engineering (required)
• 7–12+ years of relevant experience in power systems, renewables, or energy storage
• Demonstrated experience in utility-scale BESS or solar + storage projects
• Strong understanding of:
• Medium- and high-voltage electrical systems
• Inverter-based resources (IBRs)
• Protection and controls
• Experience with power system study tools (e.g., ETAP, PSCAD, SKM, or PSLF)
• Knowledge of applicable codes and standards (IEEE, NEC, NFPA, UL, utility standards)
• Professional Engineer (PE) license required or ability to obtain

Responsibilities

• Lead the engineering and design of utility-scale BESS projects (typically 10 MW to 500+ MW)
• Develop and review key design deliverables, including:
• One-line diagrams and three-line diagrams
• AC and DC system layouts
• Equipment specifications (battery systems, inverters, transformers, switchgear)
• Grounding, protection, and control schemes
• Define system architecture (DC-coupled vs. AC-coupled configurations)
• Support interconnection processes and utility coordination
• Review and interpret system impact studies and facility studies
• Coordinate or perform studies such as:
• Load flow
• Short circuit
• Protection coordination
• Harmonic analysis
• Ensure compliance with utility and ISO/RTO requirements (e.g., CAISO, WECC)
• Coordinate with civil, structural, and transmission teams for:
• Site layout and grading constraints
• Equipment foundations and trenching
• High-voltage interconnection design
• Interface with OEM vendors (battery suppliers, inverter manufacturers)
• Support project lifecycle from development through IFC (Issued for Construction) design
• Prepare engineering packages, drawings, and technical reports
• Support procurement by developing technical specifications and evaluating bids
• Assist in project scheduling, cost estimating, and risk identification
• Respond to RFIs and support field engineering during construction
• Review shop drawings and vendor submittals
• Support commissioning activities and system energization
• Serve as a technical lead in client meetings and design reviews
• Support proposals, scope development, and level-of-effort estimates
• Provide technical guidance to clients on BESS technologies and design decisions
• Mentor junior engineers and designers
• Support development of internal standards, templates, and best practices
• Contribute to building E2’s renewable and storage engineering capabilities

Benefits

• E2 Consulting Engineers, Inc. offers an excellent benefits package including health, dental, vision, and life insurance, 401(k) with employer match, paid time off.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 251-500 employees