Senior Electrical Engineer – Battery Systems, Controls & EMS Integration

ON.energy; Atlanta (GA); Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with company match

Paid time off and holidays

Job summary

ON.energy is seeking a Senior Electrical Engineer – Battery Systems, Controls & EMS Integration to lead design, validation, and optimization of utility-scale Battery Energy Storage System projects supporting next-generation data centers and grid applications. You will drive battery sizing, technology evaluation, and EMS/Plant Controller integration in a highly collaborative energy storage team.

Reporting to the Chief Electrical Engineer, you will leverage Python, PSCAD and MATLAB for analyses,

Qualifications

• 8+ years of electrical engineering experience focused on battery systems.
• Deep knowledge of battery sizing, lifecycle modeling, and BESS vendor evaluation.
• Experience with PSCAD and MATLAB.
• Strong experience leading EMS/Plant Controller integration and SCADA.
• Proficient in Python, VS Code, Jupyter Notebooks, and Git.

Responsibilities

• Battery sizing and lifecycle modeling.
• Review and validate BESS vendor models.
• Integrate EMS and Plant Controllers.
• Validate controls strategy for battery systems.
• Model inverter/PCS performance.
• SCADA configuration and operational analytics.
• Collaborate using Python, VS Code, Jupyter Notebooks, and Git.

Skills

Battery systems

EMS integration

Inverter/PCS validation

SCADA configuration

Communication

Tools

Python

VS Code

Jupyter Notebooks

Git

Job description

ON.energyis building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. ON recently announced a 5GW partnership, with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary software,ON.energydevelops projects worldwide that set new benchmarks for resilience.

Location: Tysons, VA / Atlanta, GA / Miami, FL / East Coast

Schedule: Hybrid in Tysons (or) regular visits to Tysons if East Coast

Travel: 25-30% required travel (outside of travel to Tysons)

As a Senior Electrical Engineer – Battery Systems, Controls & EMS Integration, you will provide technical leadership for the design, validation, and optimization of utility-scale Battery Energy Storage System (BESS) projects supporting next-generation data center and grid applications. Reporting to the Chief Electrical Engineer, you will lead battery sizing, evaluate BESS technologies, validate inverter/PCS performance, and drive the integration of EMS, Plant Controllers, and SCADA systems to ensure reliable, high-performing energy storage solutions. This is a highly collaborative role that combines advanced engineering analysis, controls expertise, and operational optimization to shape the future of large-scale energy infrastructure.

Key Responsibilities:

• Battery sizing and lifecycle modeling
• BESS vendor model review and validation
• EMS and Plant Controller integration
• Controls strategy validation
• Inverter/PCS modeling experience
• SCADA and operational analytics
• Python, VS Code, Jupyter Notebooks, Git

Required Qualifications:

• 8+ years of electrical engineering experience, with a focus on battery systems, BESS vendor evaluation, inverter/PCS performance validation, and EMS or Plant Controller integration.
• Battery & Controls Expertise: Deep knowledge of battery sizing, lifecycle modeling, controls strategy validation, and BESS vendor model review in utility-scale energy storage environments including experience with PSCAD and MATLAB.
• Systems Integration: Proven ability to lead EMS and Plant Controller integration efforts, including SCADA configuration and operational optimization for BESS deployments.
• Software Proficiency: Working knowledge of Python, VS Code, Jupyter Notebooks, and Git for engineering analysis and operational analytics.
• Communication: Ability to coordinate effectively with EMS vendors, controls engineers, and cross-functional teams to deliver reliable and optimized energy storage solutions.

#LI-JW1

For US-based roles - What you’ll get:

• Competitive salary + annual performance-based bonus eligibility
• Medical, dental, and vision insurance
• 401(k) with company match
• Paid time off and company holidays

For Mexico-based roles - What you’ll get:

• Competitive salary + annual performance bonus eligibility
• Christmas Bonus (Aguinaldo): 30 days
• Major medical expenses and life insurance
• Paid time off and holidays (per local policy)

For all roles:

• Professional development and growth opportunities
• Opportunity to grow with a mission-driven team shaping the future of clean energy
• Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
• Accommodations: If you need an accommodation during the application process, email [e-mail]
• Benefits vary by role and location and are subject to change.