Junior Simulation Engineer - EMS

Entry-Level, 0–2 years of experience

Hands-on experience with MATLAB and Simulink for model-based design and system simulation. Coursework, capstone, or internship experience is accepted.

Demonstrated understanding of Software-in-the-Loop and Hardware-in-the-Loop testing methodologies — what they validate, when to use each, and how they fit into a V-model development process.

Foundational knowledge of battery systems, power electronics, or energy storage technologies. Familiarity with SoC, SoH, and basic BMS functionality.

Coursework or project experience in control theory, embedded systems, or mechatronics. Ability to interpret and validate control logic behavior in simulation.

Ability to write clear technical documentation and communicate simulation findings to multi-disciplinary engineering teams.

Exposure to Hardware-in-the-Loop testing concepts and real-time simulation environments. Familiarity with how EMS/BMS hardware interfaces with simulation platforms is a plus.

Familiarity with CAN, Modbus RTU/TCP, DNP3, or IEC 61850 — enough to understand tag structure and how data availability shapes simulation interfaces.

Experience with MATLAB scripting for test automation, post-processing, and regression pipeline development. Python familiarity is a plus.

Bachelor's degree in Electrical Engineering, Mechanical Engineering, Systems Engineering, or a related field — or equivalent professional experience.

Preferred Experience

Experience with BESS, inverters, or distributed energy resources (DER) and familiarity with their operational state models and protection logic.

Ability to read and interpret single-line diagrams and understand basic power system concepts — important context for modeling accurate BESS behavior.

Exposure to version control for simulation projects (e.g., Git-based workflows for MATLAB/Simulink models).

Knowledge of Li-ion or LFP battery chemistry and cell-level behavior.

Experience with code generation from Simulink models (Simulink Coder) for deployment to embedded or real-time targets.

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.