Controls Engineer

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 and IEC 61850
• Collaborate with Network Engineers, Deployment Engineers, 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

Requirements

• Hands-on experience with Siemens PLC platforms (TIA Portal, S7-1500 / S7-1200)
• 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
• Willingness to travel to project sites

Preferred Qualifications

• 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

About the Company

ON.energy is building the power infrastructure that makes the AI era possible by providing a new class of power technology proven at gigawatt scale for hyper-scale campuses.