Senior Electrical Engineer – Battery Systems, Controls & EMS Integration

Senior Electrical Engineer – Battery Systems, Controls & EMS Integration

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:

• 10+ 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.
• 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.
• Accommodations:
  If you need an accommodation during the application process, email re
• Benefits vary by role and location and are subject to change.