🎁 Before you apply, rehearse this interview. Create your free WorkMundi account and get an Interview Training on HelpsYouSpeak — no cost, no card. I want my training →
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. The Hyperscale Datacenter Senior Electrical Engineer is the senior electrical authority for ON.energy's presence at hyperscale, colocation, enterprise, and AI-focused data centers. This role is focused on data center electrical engineering, while maintaining utility-interface fluency to translate customer, operator, substation, and site-infrastructure requirements into deployable product requirements, interfaces, and reference electrical designs. Key Responsibilities Reference Architectures & System Definition Inform the end-to-end electrical reference architectures for ON.energy products across hyperscale, colocation, enterprise, and AI factory topologies LV and MV distribution, data center substation interfaces, and next-generation 800 Vdc designs. Define single-line diagrams, redundancy models, substation interface assumptions, and fault-tolerance strategies for UPS, BESS, PCS, microgrid, and EMS integration. Establish and enforce Interface Control Documents (ICDs) between ON.energy equipment and upstream utility, downstream IT load, and site controls. Requirements Engineering Own the requirements traceability matrix from customer SOW to system architecture to subsystem to component test. Define compliance boundaries against applicable standards such as TIA-942, ASHRAE TC 9.9, and IEC 62040. Customer & Ecosystem Engagement Act as the technical face to hyperscale, colocation, and AI infrastructure customers throughout new product development. Lead architecture reviews with project engineering teams, data center operators, and chip / server OEMs. Represent ON.energy in industry working groups and codify insights into technology roadmap s . Product & Technology Roadmap Inform the architectural roadmap for ON.energy product architectures. Evaluate emerging DC power distribution, solid-state transformer , and grid-interactive architectures; recommend build / buy / partner strategies. Own vendor evaluation and technology partner scorecards from a systems-fit perspective. Experience & Requirements Education: B.S. in Electrical Engineering, Power Systems Engineering, or related field required. M.S. preferred; PhD acceptable where paired with substantial applied data center electrical design experience. Experience: 5+ years in data center electrical systems, mission-critical facilities, hyperscale infrastructure, or A&E engineering serving hyperscale / colocation customers. Domain Depth: Hyperscale and colocation electrical topologies from utility service entrance, data center substation design, MV/LV distribution, UPS and BESS integration, redundancy strategy, fault isolation, and server rack PDU interface requirements. Preferred Experience Architected power delivery for AI training clusters (>100 kW / rack, liquid-cooled, coincident load dynamics). Prior work as a hyperscaler owner's engineer, colocation infrastructure lead, or MEP principal for mission-critical facilities. Published contributions to OCP, Uptime, IEEE PES, or CIGRE. Professional Engineer (PE) license preferred, especially where paired with hands-on data center, substation, or mission-critical electrical design ownership. U.S. Person status, or ability to support DOE / national-lab collaborations where U.S. Person eligibility is required. 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.