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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. 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 Technical Modeling Leadership 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 Degree or 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. #LI-AD1 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.
Here's how to pick the right one and stand out in your application.
144.883Jobs
31.687IN
81%EN
That number is real. WorkMundi's database shows 144,883 open engineer roles across the world. India has the most with 31,687 jobs, followed by the United States with 30,084. If you just finished reading one job ad and felt paralyzed by choice, you're not alone—but this scale is actually an advantage. It means you can afford to be selective.
Start by geography and language. The majority of engineer ads—117,837 of them—have the job posting text written in English. Use that as one filter, but remember: the ad text language tells you nothing about whether the role actually requires you to speak English day-to-day. Read the job description carefully. Then check which countries have the volume you're targeting. Singapore, Poland, and Australia round out the top five after India and the US.
Next, learn who's hiring. Accenture has posted 2,801 engineer roles. andurilindustries, speechify, and jobgether are also actively recruiting. If you're applying to one of these names, research their hiring patterns and interview style before you apply. That homework pays off.
When you interview, expect the question every engineer hears: 'Tell me about a time you had to debug a problem that wasn't in your job description.' Have a specific story ready—not a general one. Name the tools, the deadline pressure, and what you learned. Hiring managers listen for whether you see problem-solving as part of the role itself, not a favour.