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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. Location: Atlanta area is preferred. Role will require travel to projects sites. Role Summary The Controls Engineer is responsible for deploying, configuring, and supporting control systems for utility-scale Battery Energy Storage System (BESS) projects. This role is central to commissioning success, ensuring reliable operation and integration of Siemens PLC-based control systems with EMS, PCS, BMS, protection systems, and site networks. Key Responsibilities Deploy, configure, and support Siemens PLC-based control systems for BESS projects Support commissioning activities including system bring-up, integration testing, and site acceptance testing (SAT) Troubleshoot PLC logic, communications, and I/O issues during commissioning and early operations Integrate PLCs with EMS, PCS, BMS, protection relays, meters, and SCADA systems Support communication protocols such as Modbus TCP/RTU, IEC 61850 (as applicable), and other OT interfaces Collaborate closely with Network Engineers, Deployment Engineers, EMS teams, and Field Commissioning teams Support factory acceptance testing (FAT) and field commissioning activities Assist with developing standardized PLC configurations, templates, and commissioning procedures Review and validate control system documentation, drawings, and as-built configurations Travel to project sites during deployment and commissioning phases as required Required Experience & Skills Hands-on experience with Siemens PLC platforms (TIA Portal, S7-1500 / S7-1200 or similar) Experience commissioning or supporting industrial control systems in the field Strong understanding of PLC-based control architectures and OT systems Experience integrating PLCs with external systems (EMS, SCADA, PCS, BMS, protection) Ability to troubleshoot across controls, networking, and software boundaries Comfortable working in fast-paced commissioning environments with time pressure Willingness to travel to project sites during deployment and commissioning Preferred Experience Experience with utility-scale BESS, power generation, renewables, or substation environments Familiarity with EMS platforms and grid-interactive systems Experience supporting commissioning teams on live sites Understanding of cybersecurity considerations in OT environments Background working alongside EPCs, vendors, and OEMs What Success Looks Like (6–12 Months) Siemens PLC-based control systems are deployed reliably across new BESS projects Commissioning timelines are supported through rapid issue resolution and system readiness Control system integration issues are identified and resolved efficiently Documentation quality and repeatability improve across deployments Field and commissioning teams trust this role as a key technical partner #LI-JW1 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.
