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.Location: Atlanta area is preferred. Role will require travel to project sites.Role SummaryThe 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 ResponsibilitiesDeploy, configure, and support Siemens PLC-based control systems for BESS projectsSupport 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 operationsIntegrate PLCs with EMS, PCS, BMS, protection relays, meters, and SCADA systemsSupport communication protocols such as Modbus TCP/RTU, IEC 61850 (as applicable), and other OT interfacesCollaborate closely with Network Engineers, Deployment Engineers, EMS teams, and Field Commissioning teamsSupport factory acceptance testing (FAT) and field commissioning activitiesAssist with developing standardized PLC configurations, templates, and commissioning proceduresReview and validate control system documentation, drawings, and as-built configurationsTravel to project sites during deployment and commissioning phases as requiredRequired Experience & SkillsHands-on experience with Siemens PLC platforms (TIA Portal, S7-1500 / S7-1200 or similar)Experience commissioning or supporting industrial control systems in the fieldStrong understanding of PLC-based control architectures and OT systemsExperience integrating PLCs with external systems (EMS, SCADA, PCS, BMS, protection)Ability to troubleshoot across controls, networking, and software boundariesComfortable working in fast-paced commissioning environments with time pressureWillingness to travel to project sites during deployment and commissioningPreferred ExperienceExperience with utility-scale BESS, power generation, renewables, or substation environmentsFamiliarity with EMS platforms and grid-interactive systemsExperience supporting commissioning teams on live sitesUnderstanding of cybersecurity considerations in OT environmentsBackground working alongside EPCs, vendors, and OEMsWhat Success Looks Like (6–12 Months)Siemens PLC-based control systems are deployed reliably across new BESS projectsCommissioning timelines are supported through rapid issue resolution and system readinessControl system integration issues are identified and resolved efficientlyDocumentation quality and repeatability improve across deploymentsField and commissioning teams trust this role as a key technical partnerFor US-based Roles - What You'll GetCompetitive salary + annual performance-based bonus eligibilityMedical, dental, and vision insurance401(k) with company matchPaid time off and company holidaysFor Mexico-based Roles - What You'll GetCompetitive salary + annual performance bonus eligibilityChristmas Bonus (Aguinaldo): 30 daysMajor medical expenses and life insurancePaid time off and holidays (per local policy)For All RolesProfessional development and growth opportunitiesOpportunity to grow with a mission-driven team shaping the future of clean energyEqual 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 View email address on click.appcast.io vary by role and location and are subject to change.J-18808-Ljbffr