🎁 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. We’re looking for Principal Controls Engineer with project-based engineering experience to lead network-and-controls-related hardware product design, documentation, project-specific technical compliance and support the development activities related to these products. This is a product focused role —we need someone who can speak fluently about both network architecture and industrial control systems , ideally have experience in mission critical applications , and interface with IT, software, project, commissioning and O&M engineering teams. Key Responsibilities: Support the business development team by providing technical proposals e.g. network diagrams that meet the customer’s needs. Collaborate across control systems, SCADA, and IT teams to ensure complete and secure connectivity Integrate and support industrial protocols like Modbus, DNP3, and OPC-UA Compile product technical information packages for the project engineering team. Co-lead review and validation of network/controls product-related topics during the project execution phase. Maintain technical documentation including as-built drawings Support product development by capturing design improvement feedback from the different project phases: design, commissioning and O&M. Support product development by recommending design approaches and vendors of the main equipment. Participate in product design sprints with the development team. Participate in the product’s commissioning phase . Required Experience Bachelor’s degree in Controls Engineering, Electronics Engineering, or similar technical field. 12 + years of hands-on controls engineering experience in project-based or industrial settings. Proven experience in project network deployments , not just operations Strong grasp of protocols (TCP/IP, BGP, OSPF, VLANs, VPNs) Significant experience with control systems and operational technology (OT) Ability to produce and read network and control architecture drawings Excellent communication skills across technical and non-technical teams. Willing to travel up to 20% for product FAT inspection and site commissioning witnessing. Preferred Experience Certifications: ISA CAP/CCST, Rockwell, Siemens, Schneider or similar Experience with BESS, SCADA, EMS , Safety Systems or utility-scale infrastructure Background in energy, utility, or data center environments 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.