Senior Power Systems Engineer - R&D

ON.energy; Denver (CO); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Medical, dental, vision insurance

401(k) with company match

Paid time off and holidays

Job summary

ON.energy is seeking a Senior Power Systems Modeling Engineer to own EMT and dynamic modeling, validation, and grid performance assessment for its energy-storage systems. The role interfaces with R&D, Controls, Test, Product, and project teams, including utilities and ISOs.

You will drive modeling standards, perform validation against hardware, and support interconnection studies and large-load applications across global deployments.

Qualifications

• Masters or PhD in Electrical Engineering, Power Systems Engineering or related technical discipline.
• 5–8 years of advanced power systems modeling experience, including EMT, RMS, dynamic modeling, inverter-based resources, BESS, large loads or transmission-connected facilities.
• Experience with EMT, RMS, dynamic modeling, inverter-based resources, and large-scale interconnection studies.

Responsibilities

• Define modeling standards and governance across EMT, RMS, transient, steady-state, HIL, and real-time simulations.
• Own model lifecycle management, ensuring alignment with hardware, firmware, and plant configurations.
• Lead technical execution for interconnection studies, product qualification, and grid requirement evaluations.
• Mentor engineers and coordinate with external consultants, utilities, ISOs, and stakeholders.

Skills

EMT modeling

RMS

Dynamic modeling

Inverter-based resources

BESS

Large-load modeling

PSCAD

Hardware-in-the-loop

ISO/utility interconnection

Education

Master's degree in Electrical Engineering

Ph.D. in Electrical Engineering

Power Systems Engineering

Tools

PSCAD

PSSE

PSLF

MATLAB/Simulink

Job description

ON.energyis 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.energydevelops projects worldwide that set new benchmarks for resilience.

ROLE SUMMARY

The Senior Power Systems Modeling Engineer is ON.energy’s technical owner for power system modeling, model validation, and grid performance assessment. This role sets modeling standards, leads high-impact simulation work, and ensures models accurately represent ON.energy hardware, controls, firmware, protection settings, and plant-level operating modes.

The position supports product development, interconnection studies, grid requirements demonstrations, customer projects, and emerging large-load applications. It serves as a key technical bridge across R&D, Controls, Test, Product, Project Engineering, external consultants, customers, utilities, ISOs, and standards organizations.

Key focus areas include EMT and dynamic modeling, ERCOT Model Quality Testing, evolving large-load ride-through requirements, hardware-to-model matching, Hardware-in-the-Loop and real-time simulation, and project-specific modeling support for ON.energy deployments.

RESPONSIBILITIES

• Define modeling standards: Establish ON.energy’s modeling philosophy, validation methods, governance processes, and quality expectations across EMT, RMS, transient, steady-state, HIL, and real-time simulation environments.
• Own model lifecycle management: Ensure models remain aligned with released hardware, firmware, controls algorithms, protection settings, plant controls, and project-specific configurations.
• Serve as technical authority: Provide expert judgment on model fidelity, validation evidence, simulation assumptions, and external model submissions.

Project and Product Support

• Lead technical execution: Develop, review, and approve EMT and dynamic models supporting interconnection studies, customer applications, product qualification, and grid requirements.
• Support project modeling: Partner with Project Engineering on study assumptions, equivalent models, SLD representation, equipment settings, operating conditions, and data requirements.
• Assess system performance: Evaluate ride-through behavior, weak-grid performance, harmonics, generator interations, startup behavior, control response, and large-disturbance response.

Validation, HIL, and Hardware Matching

• Ensure hardware-to-model alignment: Confirm models represent inverter behavior, BESS response, EMS functionality, firmware, protection, controls, and fielded product configurations.
• Correlate models with evidence: Compare simulations against lab tests, HIL results, commissioning data, field measurements, disturbance records, and vendor model behavior.

Grid Requirements, Consultant Oversight, and Technical Leadership

• Lead grid requirements modeling: Serve as technical lead for ISO MQT, large-load ride-through evaluations, and evolving grid requirements.
• Oversee external studies: Direct and review work performed by consultants and study partners, ensuring technical quality, traceability, and consistency with ON.energy standards.
• Influence product and engineering direction: Translate modeling insights into recommendations for controls, firmware, hardware design, validation investments, customer applications, and roadmap priorities.
• Mentor and represent: Guide engineers across modeling, controls, test, and project teams, and represent ON.energy in technical discussions with utilities, ISOs, consultants, customers, and industry groups.

EXPERIENCE AND REQUIREMENTS

• Education: Masters Degreeor Ph.D. in Electrical Engineering, Power Systems Engineering, or a related technical discipline.
• Experience: 5 - 8 years of advanced power systems modeling experience, including EMT, RMS, dynamic modeling, inverter-based resources, BESS, large loads, or transmission-connected facilities.
• Tools: Expertise with PSCAD, PSSE, PSLF, MATLAB/Simulink, and related simulation platforms; experience with HIL or real-time simulation platforms strongly preferred.
• Grid requirements: Strong understanding of ISO and Utility interconnection requirements, MQT, NERC reliability standards, inverter-based resource requirements, and evolving large-load expectations.
• Technical breadth: Fluency in inverter controls, protection settings, firmware behavior, EMS functions, UPS/BESS architectures, and hardware/software integration.
• Leadership: Demonstrated ability to set technical direction, influence across engineering disciplines, review complex deliverables, communicate with external stakeholders, and create scalable engineering processes.

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 [e-mail]
• 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.