Senior Electrical Engineer – Battery Systems, Controls & EMS Integration

ON.energy is 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.energy develops projects worldwide that set new benchmarks for resilience.

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.

· 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

· 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.

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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 recruitment@onenergystorage.com
• Benefits vary by role and location and are subject to change.

Agency Notice: ON.energy does not accept unsolicited resumes from staffing agencies, search firms, or third-party recruiters.

Resumes submitted without a fully executed Master Services Agreement (MSA) and a written request from an authorized member of our Talent Acquisition team will be considered the property of ON.energy.

No placement fees or compensation will be paid for unsolicited candidate submissions.