Principal Electrical Engineer – Battery Systems, Controls & EMS Integration

ON.energy; Atlanta (GA); Remote; USD 140,000 - 190,000; Full time

Benefits offered by this job

Medical insurance

401(k) with match

Paid time off

Job summary

ON.energy is setting the standard for large load interconnection and provides utility-scale energy storage solutions. The Senior Electrical Engineer – Battery Systems will lead battery sizing, validate BESS technologies, and drive EMS/Plant Controller and SCADA integrations for reliable data center and grid applications.

You will work with PSCAD, MATLAB, and Python to optimize controls and system performance, collaborating with cross-functional teams and vendors to deliver high-impact energy

Qualifications

• 8+ years of electrical engineering experience with focus on battery systems and BESS vendor evaluation.
• Experience validating inverter/PCS performance and EMS/Plant Controller integration.
• Strong software skills: Python, VS Code, Jupyter Notebooks, Git.
• Excellent cross-functional communication and collaboration.

Responsibilities

• Battery sizing and lifecycle modeling.
• BESS vendor model review and validation.
• EMS and Plant Controller integration across systems.
• Controls strategy validation and SCADA configuration.
• Inverter/PCS modeling and performance validation.
• SCADA and operational analytics.

Skills

Battery systems expertise

EMS integration

SCADA configuration

Cross-functional communication

Tools

PSCAD

MATLAB

Python

VS Code

Jupyter Notebooks

Git

Job description

ON.energyis setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center.With multiple gigawatts currently under construction, we are enabling grid-safe data centers.

Location: United States, Remote with 30% travel, domestic and international

Travel: 25-30% required travel

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, PCS & 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.

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.
• Benefits vary by role and location and are subject to change.