Senior Test Engineer - HIL at ON.energy

<div class="content-intro"><p>ON.energy<span class="Apple-converted-space">&nbsp;</span>is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center.&nbsp;With multiple gigawatts currently under construction, we are enabling grid-safe data centers.&nbsp;</p></div><h3>Role Summary</h3> <p>The HIL Test Engineer develops and operates hardware-in-the-loop and real-time simulation capability for ON.energy storage and power conversion products. The role covers real-time model development, integration of controllers and firmware with the simulation environment, execution of structured test campaigns, and the reporting that supports design reviews and product release.&nbsp;This is a hands-on laboratory and integration role, working closely with the controls, firmware, modeling, and product engineering teams.</p> <p>&nbsp;</p> <h3>Key Responsibilities</h3> <ul> <li>Develop and maintain real-time models of plant, grid, and equipment behavior for use in controller testing.</li> <li>Configure and operate the HIL environment, including real-time simulator, I/O interfaces, signal conditioning, and data acquisition.</li> <li>Integrate product controllers, control software, and firmware builds with the simulation environment, and maintain those configurations under version control.</li> <li>Integrate supplier-provided equipment models and develop equivalent models where required.</li> <li>Plan and execute functional, performance, fault, boundary-condition, and regression test campaigns against defined acceptance criteria.</li> <li>Verify control performance across normal operation, disturbances, abnormal conditions, and recovery.</li> <li>Compare test results against offline simulation studies and laboratory measurements, and resolve discrepancies.</li> <li>Develop scripts and tooling to automate test execution, data processing, and reporting.</li> <li>Investigate failures with controls and firmware engineers, support root-cause analysis, and re-test to closure.</li> <li>Prepare test reports documenting method, configuration, results, limitations, and recommendations.</li> <li>Maintain laboratory safety, equipment, configuration records, and documentation.</li> </ul> <p>&nbsp;</p> <h3>Key Requirements</h3> <ul> <li>5+ years of experience in HIL testing, real-time simulation, controls validation, or laboratory testing of grid-connected power electronics.</li> <li>Bachelor's degree or higher in electrical engineering, power systems, controls engineering, or a related discipline.</li> <li>Direct experience on at least one real-time simulation platform, such as RTDS/RSCAD, Typhoon HIL, or OPAL-RT.</li> <li>Working capability with offline simulation tools such as MATLAB/Simulink and PSCAD, and an understanding of what has to change when a model is made to run in real time.</li> <li>Grounding in inverter controls, energy storage systems, and power system dynamics.</li> <li>Python, or a comparable language, used in earnest for test automation and data analysis.</li> <li>Test plans, procedures, and acceptance criteria you have authored yourself, and the analytical rigor to stand behind the results.</li> <li>Familiarity with SCADA systems and industrial communication protocols such as Modbus, DNP3, CAN, and IEC 61850.</li> <li>Comfort on the bench with power supplies, oscilloscopes, transducers, and data acquisition hardware.</li> <li>The ability to present technical findings credibly to engineering audiences and clearly to field and commissioning personnel.</li> </ul> <p>Preferred Experience</p> <ul> <li>Experience with grid-forming and grid-following inverter control.</li> <li>Experience with uninterruptible power supply systems, microgrids, or facilities serving critical load.</li> <li>Familiarity with ISO or utility interconnection requirements, model quality testing, or third-party product certification.</li> <li>Continuous-integration pipelines driving automated test suites, with version control applied to models as rigorously as to code.</li> <li>Prior collaboration with national laboratories or university test centers.</li> </ul><div class="content-conclusion"><hr> <p><strong>For US-based roles - What you’ll get:</strong></p> <ul> <li>Competitive salary + annual performance-based bonus eligibility</li> <li>Medical, dental, and vision insurance</li> <li>401(k) with company match</li> <li>Paid time off and company holidays&nbsp;</li> </ul> <p><strong>For Mexico-based roles - What you’ll get:</strong></p> <ul> <li>Competitive salary + annual performance bonus eligibility</li> <li>Christmas Bonus (Aguinaldo): 30 days</li> <li>Major medical expenses and life insurance</li> <li>Paid time off and holidays (per local policy)</li> </ul> <p><strong>For all roles:</strong></p> <ul> <li>Professional development and growth opportunities</li> <li>Opportunity to grow with a mission-driven team shaping the future of clean energy</li> <li>Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.</li> <li>Benefits vary by role and location and are subject to change.</li> </ul> <p><strong data-start="453" data-end="471">Agency Notice:</strong><span class="Apple-converted-space">&nbsp;</span>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.</p></div>