Job description
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, develops projects worldwide that set new benchmarks for resilience.
**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.
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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: 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](mailto:recruitment@onenergystorage.com)
- Benefits vary by role and location and are subject to change.
**Agency Notice:** 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 . No placement fees or compensation will be paid for unsolicited candidate submissions.
