Senior Engineer – Battery Energy Storage Systems

E2 Consulting Engineers, Inc.

. Lead the engineering and design of utility-scale BESS projects (typically 10 MW to 500+ MW) .

Posted 4/21/2026full-timePasadena • California • 🇺🇸 United StatesSenior💰 $150,000 - $200,000 per yearWebsite

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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

Benefits

Comp & perks

health, dental, vision, and life insurance
401(k) with employer match
paid time off

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

BESS designone-line diagramsthree-line diagramsAC system layoutsDC system layoutsload flow analysisshort circuit analysisharmonic analysisprotection coordinationsystem architecture

Soft Skills

technical leadmentoringclient communicationproject schedulingrisk identificationteam coordinationtechnical guidancescope developmentproposal supportbest practices development

Certifications

Bachelor's degree in Electrical EngineeringProfessional Engineer (PE) license