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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 Our Research & Development team is looking for a hands-on Test Engineer to join our Houston team. This is a versatile, growth-oriented role for an engineer who wants to build a broad foundation across testing, design, and field work. You will support our Test Engineering team in designing, integrating, and executing tests for state of the art power conversion systems, energy storage systems, and control architectures in high-stakes, advanced applications as part of ON.energy's Research and Development group. You will also contribute to electrical design deliverables and participate in the assembly, integration, troubleshooting, and testing of equipment in a laboratory environment. The ideal candidate is curious and adaptable—comfortable moving between a lab bench, a CAD tool, and physical equipment on the same day. You should be eager to learn new tools and technologies, including simulation and programming platforms such as MATLAB/Simulink, PLC programming, and Hardware-in-the-Loop (HIL) systems, while being comfortable working directly with electrical and test equipment up to 2000Vdc and 1000Vac. We value drive, curiosity, and a willingness to take on new challenges as much as years of experience. This role is an opportunity to develop a broad engineering skill set while working on advanced power conversion and energy storage technologies. Responsibilities: Laboratory Validation Support the development and execution of test procedures for high-power power electronic converters and energy storage systems. Operate laboratory equipment such as oscilloscopes, multimeters, power analyzers, power supplies, generators, and load banks to perform functional, performance, and stress testing. Identify and reproduce edge-case failures in controlled laboratory environments and analyze test data to support hardware and software improvements. Execute functional and performance tests against product requirements, documenting results in accordance with applicable safety standards and laboratory procedures. Documentation Prepare and maintain single-line diagrams (SLDs), electrical calculations, technical reports, and bills of materials (BOMs). Support component selection for batteries, BMS, inverters, protection devices, and related electrical components. Translate laboratory findings and test procedures into field-ready commissioning and technical documentation, lessons learned, application notes, and reports. Interact with component vendors to properly apply their products and resolve non-conformance issues identified in the lab. Hands-On Field Work Participate in, and oversee technician support to, install, connect, configure, and reconfigure laboratory and field equipment. Provide hands-on technical support during equipment integration, laboratory testing, troubleshooting, and commissioning activities. Support field testing and commissioning activities as required, including troubleshooting equipment and validating system performance. Learning and Growth Develop proficiency in engineering tools and platforms such as MATLAB/Simulink, PLC programming, and Hardware-in-the-Loop (HIL) systems. Build knowledge of power electronics, BESS controls, Grid-Following (GFL), and Grid-Forming (GFM) applications through hands-on testing and project work. Progress toward greater ownership of test design, electrical design deliverables, troubleshooting, and technical validation. Required Experience Bachelor's degree in Electrical Engineering, Electro-Mechanical Engineering, or a related field. 1 to 2 years of experience in design, integration and testing of electrical installations. Strong entry-level candidates with internship or academic project experience and a demonstrated willingness to learn will be considered. Foundational knowledge of power electronics (inverters/rectifiers) and an interest in the bulk power systems, BESS, and other grid-enhancing technologies. Ability to read electrical diagrams and prepare technical documentation. Familiarity with relevant standards (UL, NEC, IEEE, and similar). Willingness to perform hands-on physical work in a laboratory environment. Able to work 100% on-site in Houston, Texas. Preferred Experience Experience operating laboratory test equipment, including oscilloscopes, multimeters, power analyzers/meters, load banks, power supplies, and generators. Exposure to MATLAB/Simulink or other engineering simulation tools. Proficiency with AutoCAD or similar electrical drafting/design software. Basic knowledge of Hardware-in-the-Loop (HIL) testing and simulation. Basic understanding of SCADA systems and industrial communication protocols such as Modbus TCP/IP. Basic scripting or programming experience using Python, MATLAB, or similar languages for test automation, data acquisition, or data analysis. Strong analytical and problem-solving skills, with the ability to troubleshoot technical issues methodically. Strong teamwork and communication skills, with a willingness to learn and work across multiple engineering disciplines. 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.