Controls Engineer
ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future.
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
What You’ll Get
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Competitive salary + performance bonus
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401(k) match, health, vision, dental
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Paid time off and company holidays
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Work that matters—building resilient, secure infrastructure for the future of energy
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